High-Pressure Check Valve for Frac Pumps

Description

Product Overview

GPE manufactures High-Pressure Check Valves for hydraulic fracturing, cementing, acidizing, well testing, circulation, pressure-pumping and abrasive flowback systems.

The valve allows fluid to move in the specified forward direction and automatically closes when flow stops or reverses. This prevents downstream pressure and fluid from returning toward Frac Pumps, plunger pumps, fluid ends, pump discharge manifolds and other upstream equipment.

GPE manufactures three principal structures:

In-Line Swing / Flapper Check Valve
Top-Entry Flapper Check Valve
Dart-Type Spring Check Valve

The manufacturing range covers 2, 3 and 4 in nominal sizes with working-pressure classes from 6,000 to 20,000 psi. Standard configurations include high-pressure hammer-union ends, API flanged ends, male-to-female or female-to-male flow orientation, Standard Service and H₂S Service.

The forged alloy-steel pressure body, replaceable internal closure components and precision-machined sealing surfaces provide stable non-return performance under pressure pulsation, pump shutdown, manifold switching and high-pressure flowline operation.

GPE Check Valves are installed with related High-Pressure Plug Valves, High-Pressure Swivel Joints, Emergency Relief Valves and complete Flowline & Frac Manifold systems.

Need a Check Valve for Your Frac Pump or Flow Iron System?

Send GPE the required size, working pressure, valve structure, flow direction, end connection, service condition and quantity. Our engineering team will confirm the correct non-return valve configuration and provide a factory quotation.

Request a Check Valve Quote:
https://gpepump.com/contact/

Send Your Check Valve Drawing:
info@gpepump.com

Product Short Description

GPE High-Pressure Check Valves provide automatic backflow protection for Frac Pumps, plunger pumps, pump discharge lines, treatment manifolds and temporary Flow Iron.

Forward pressure opens the internal flapper or dart and allows fluid to pass through the valve. When forward flow decreases, stops or reverses, the closure element returns to the seat and blocks reverse pressure from reaching upstream equipment.

In-Line Swing models provide a compact low-restriction flow path. Top-Entry models allow internal parts to be serviced after the line has been isolated without removing the complete body from the flowline. Dart-Type models use a spring-loaded axial closure for rapid response and controlled closing.

Product Highlights

Automatic non-return protection
Prevents reverse fluid and pressure flow
Protects Frac Pumps and plunger-pump fluid ends
Isolates inactive parallel pump branches
Nominal sizes from 2 to 4 in
Working pressures from 6,000 to 20,000 psi
Metric pressure classes from 42 to 140 MPa
In-Line Swing / Flapper design
Top-Entry Flapper design
Dart-Type spring-assisted design
Forged alloy-steel pressure body
Controlled quenching and tempering
CNC-machined flow bores and sealing surfaces
Replaceable flapper, dart, seat, spring and seal components
Compact in-line structure
Full-opening flapper flow path
Service-in-place top-entry construction
Rapid spring-assisted dart closure
Female-to-Male flow orientation
Male-to-Female reverse-flow orientation
High-pressure hammer-union connections
API flanged connections
Standard Service
H₂S and Sour Service
PU temperature class from -29°C to 121°C
NACE MR0175 / ISO 15156 material selection
Forging ultrasonic inspection
Magnetic-particle inspection
Hardness inspection
Hydrostatic body testing
Reverse-pressure closure testing
Functional opening and closing testing
Complete internal and redress kits
Replacement-compatible manufacturing

Main Technical Specifications

Parameter	GPE Manufacturing Range
Product	High-Pressure Check Valve
Alternative name	Non-Return Valve
Product category	High-Pressure Flow Iron and Pressure-Control Valve
Valve function	Allows forward flow and prevents reverse flow
Nominal sizes	2, 3 and 4 in
Working pressure	6,000–20,000 psi
Metric pressure class	42–140 MPa
Pressure series	6K, 10K, 15K and 20K
Working temperature	-29°C to 121°C
Temperature class	PU
Service environment	Standard Service or H₂S Service
Available structures	In-Line Swing, Top-Entry Flapper and Dart Type
Body construction	Forged and heat-treated alloy steel
In-Line closure	Hinged flapper or spring-loaded dart
Top-Entry closure	Replaceable flapper assembly
Dart mechanism	Axial dart, guide, spring and seat
Flow direction	Female-to-Male or Male-to-Female
Internal flow path	Model-specific full-opening or axial flow path
End connections	Hammer union and API flange
Main applications	Fracturing, cementing, acidizing, testing, circulation and flowback
H₂S material selection	NACE MR0175 / ISO 15156
API configuration	API Spec 6A requirements for applicable flanged top-entry configurations
Inspection	UT, MPI, hardness, dimensional and functional inspection
Pressure testing	Hydrostatic body, forward-flow and reverse-closure testing
Supply scope	Complete valve, internal kit, seal kit and redress parts

Confirm the Correct Check Valve Structure

The correct valve structure depends on flow rate, pressure class, allowable pressure loss, solids content, maintenance method, flow direction and installation space.

Send GPE the pump model, maximum flow rate, normal pressure, valve size, connection, flow direction and service fluid. We will confirm whether an In-Line Swing, Top-Entry Flapper or Dart-Type Check Valve provides the correct protection.

Get the Correct Check Valve Model:
https://gpepump.com/contact/

Send Check Valve Specifications:
info@gpepump.com

Standard Pressure Configurations

Working Pressure	Metric Class	Typical System Position
6,000 psi	42 MPa	Cementing, circulation and medium-pressure service
10,000 psi	70 MPa	Acidizing, testing and high-pressure pumping
15,000 psi	105 MPa	Hydraulic fracturing and Fig 1502 Flow Iron
20,000 psi	140 MPa	Ultra-high-pressure pumping and engineered Flow Iron

The complete valve pressure rating is controlled by the lowest-rated body, bonnet, closure component, end connection, seal system and service configuration.

Standard Size and Pressure Matrix

Nominal Size	6K	10K	15K	20K
2 in	●	●	●	●
3 in	●	●	●	●
4 in	●	●	●	●

The approved manufacturing drawing defines:

Internal bore
Seat diameter
Cracking-pressure range
End-to-end dimension
Overall height
Closure geometry
Union or flange interface
Minimum wall thickness
Product weight
Flow-direction marking

What Is a High-Pressure Check Valve?

A High-Pressure Check Valve is an automatic non-return valve installed in a pressure-pumping line.

The valve opens when inlet pressure creates forward flow through the approved direction. When forward flow stops or downstream pressure becomes higher than upstream pressure, the closure element returns to the seat and blocks reverse flow.

The valve protects upstream equipment from:

Reverse pressure
Reverse fluid movement
Pump-to-pump backflow
Manifold pressure migration
Fluid-end reverse loading
Pressure transfer into an inactive pump branch
Uncontrolled return flow after pump shutdown

The arrow marked on the valve body identifies the permitted forward-flow direction.

Check Valve Working Principle

Forward Flow

Forward pressure acts on the flapper or dart.

When the inlet-to-outlet differential pressure exceeds the opening force, the closure element moves away from the seat and fluid passes through the valve.

Flow Reduction

As forward flow decreases, the closure element moves toward the seat under gravity, spring force or reverse differential pressure.

Reverse Flow

When outlet pressure exceeds inlet pressure, reverse pressure forces the flapper or dart firmly against the seat.

The closed valve blocks pressure and fluid from returning toward the pump or upstream equipment.

Pressure Equalization

A seated Check Valve can trap pressure between the valve and another closed isolation valve.

Both sides of the valve are safely vented and verified at zero pressure before inspection, bonnet removal or internal servicing.

In-Line Swing / Flapper Check Valve

The In-Line Swing Check Valve uses a hinged flapper installed inside a compact two-piece pressure body.

Forward flow rotates the flapper away from the seat and opens the flow path. When flow stops or reverses, reverse pressure returns the flapper to the seat and prevents backflow.

In-Line Swing Advantages

Compact end-to-end dimensions
Large open flow area
Low pressure loss
Reduced normal-flow restriction
Simple closure movement
Suitable for high flow rates
Replaceable internal flapper and seals
Suitable for temporary Flow Iron

Main Applications

Frac Pump discharge branches
Pump Discharge Manifolds
Cementing lines
Acidizing lines
Well-test flowlines
High-pressure circulation systems
Flowback lines

The In-Line Swing design is selected where low restriction and compact installation are primary requirements.

Top-Entry Flapper Check Valve

The Top-Entry Check Valve uses a removable bonnet above the flow bore.

After the system has been isolated, depressurized and verified safe, the bonnet is removed and the internal flapper, seat and seals are serviced without removing the complete valve body from the flowline.

Top-Entry Advantages

Internal servicing without removing the body from the line
Reduced maintenance disassembly
Fast replacement of wear components
Clear access to flapper and seat
Robust structure for portable treatment lines
Lifting eye for controlled bonnet handling
Hammer-union or flanged connections
Suitable for Standard and H₂S Service

Main Applications

Portable high-pressure flowlines
Frac Pump manifold systems
Cementing skids
Well-test packages
Pressure-control manifolds
Choke-and-kill equipment
Long-duration field service

The top-entry design reduces maintenance time where the valve body is integrated into a manifold or rigid flowline.

Dart-Type Check Valve

The Dart-Type Check Valve uses an axial dart, spring, guide and seat.

Forward pressure pushes the dart away from the seat and compresses the spring. When forward flow decreases or reverses, the spring drives the dart back into the seat.

Dart-Type Advantages

Rapid spring-assisted closing
Controlled axial movement
Compact body structure
Positive closure at low flow
Stable installation in horizontal or vertical lines
Replaceable dart, spring and seat
Directional flow control

Dart-Type Flow Consideration

The dart and spring remain inside the normal flow path. This creates more forward-flow restriction than a full-opening swing or flapper design.

The Dart-Type Check Valve is selected where rapid closure and positive spring assistance are more important than minimum pressure loss.

Swing Check Valve vs Dart Check Valve

Swing / Flapper Type	Dart Type
Hinged flapper moves out of the primary flow path	Axial dart remains in the central flow path
Larger open flow area	More controlled spring-assisted closing
Lower normal-flow pressure loss	Higher normal-flow restriction
Suitable for high-rate fracturing and cementing	Suitable for rapid closure and defined cracking pressure
Gravity and reverse pressure assist closure	Spring and reverse pressure assist closure
Flapper and seat are primary wear components	Dart, guide, spring and seat are primary wear components

Top-Entry vs In-Line Check Valve

Top-Entry Check Valve	In-Line Check Valve
Internal components accessed through a removable bonnet	Body is opened through the in-line body connection
Body remains installed during internal maintenance	Valve is normally removed or body sections separated
Larger external envelope	Compact external envelope
Suitable for manifold and skid integration	Suitable for temporary compact Flow Iron
Flapper structure	Flapper or dart structure
Hammer-union and API flanged ends	Primarily hammer-union ends

Cracking Pressure

Cracking pressure is the forward differential pressure required to begin opening the valve.

The required cracking pressure is controlled by:

Closure weight
Spring force
Seat diameter
Flapper or dart geometry
Installation orientation
Fluid density
Seal friction
Service temperature

GPE machines and assembles each model to the approved cracking-pressure range.

A cracking pressure that is too high increases pump load and pressure loss. A cracking pressure that is too low can cause unstable closure, vibration or reverse leakage.

Reverse-Pressure Sealing

Reverse pressure acts on the closure element and forces it against the seat.

The reverse-pressure sealing system includes:

Flapper or dart sealing surface
Replaceable seat
Body and bonnet seals
Guide components
Spring components for dart designs
Retaining and locking components

The reverse-pressure rating is equal to the approved valve working-pressure rating after successful body and closure testing.

Full-Opening Flapper Flow Path

In swing and top-entry designs, the flapper moves away from the primary bore during forward flow.

This provides:

Large flow area
Reduced pressure loss
Reduced local velocity increase
Improved proppant transport
Improved cement-slurry transport
Reduced solids accumulation
Easier flushing

The open flapper position is controlled to prevent impact damage and unstable movement under high flow.

Flow Direction and End Orientation

The standard Flow Iron arrangement is manufactured with Female-to-Male forward flow.

GPE also manufactures Male-to-Female reverse-flow configurations.

The approved drawing and body arrow define:

Inlet connection
Outlet connection
Forward-flow direction
Male and female orientation
Installation direction
Bonnet orientation
Service access

The valve is never installed based only on connection appearance.

Fig 1502 Hammer-Union Configuration

The principal 15K configuration uses Fig 1502 hammer-union ends.

This configuration provides:

Rapid field installation
Compact Flow Iron connection
Compatibility with fracturing lines
Replaceable union seal
Defined male and female orientation
Pressure-rated mechanical connection

The valve integrates naturally with GPE Swivel Joints and Plug Valves in pump discharge and manifold assemblies.

Connection verification includes:

Figure number
Nominal size
Male or female end
Union thread geometry
Seal-ring profile
Working-pressure rating
Standard or H₂S Service
Dimensional compatibility

API Flanged Top-Entry Configuration

GPE manufactures flanged Top-Entry Check Valves for wellhead, tree, manifold and pressure-control equipment.

API Spec 6A requirements are applied to check-valve configurations ordered within the applicable wellhead and tree equipment scope.

The API configuration defines:

Rated working pressure
Nominal bore
Flange size and type
Material class
Temperature class
Product Specification Level
Performance requirement
Closure testing
Marking and documentation

Hammer-union Flow Iron Check Valves for fracturing, cementing, acidizing and flowback are manufactured according to GPE drawings, the stated pressure class, service conditions and purchase specification.

Standard Service

Standard-Service Check Valves handle compatible non-sour fluids, including:

Fracturing fluid
Cement slurry
Drilling fluid
Completion brine
Water
Compatible oil-based fluids
Well-test fluids
Flowback fluids

Standard-Service pressure parts and repair components remain separated from H₂S Service components.

H₂S and Sour Service

GPE H₂S Service Check Valves use:

Controlled-hardness pressure-body materials
Qualified heat-treatment procedures
H₂S-compatible seals
Sour-service closure and seat materials
Hardness inspection
Full heat-number traceability
NACE MR0175 / ISO 15156 material selection

The purchase specification states:

H₂S partial pressure
CO₂ concentration
Chloride concentration
Fluid pH
Maximum operating temperature
Total system pressure
Acid concentration
Chemical additives

H₂S Service components are permanently identified and are not mixed with Standard-Service repair parts.

Hydraulic Fracturing Applications

GPE Check Valves protect:

Frac Pump fluid ends
Individual pump discharge branches
Pump Discharge Manifolds
Frac Missiles
Zipper Manifolds
High-pressure treatment lines
Pressure-test sections
Standby pump branches

In a multi-pump Frac Spread, a Check Valve prevents manifold pressure from returning into a stopped or isolated pump branch.

The valve is installed upstream or downstream of the High-Pressure Plug Valve according to the approved manifold layout and isolation philosophy.

Cementing Applications

The Check Valve prevents cement slurry and displacement fluid from returning toward the cementing pump after pump shutdown.

It is installed in:

Cementing-unit discharge lines
Cementing manifolds
High-pressure pump branches
Cement-head supply lines
Circulation lines
Pressure-test lines

After cementing, the valve is flushed before slurry hardens around the flapper, dart, spring or seat.

Acidizing Applications

Acidizing Check Valves use pressure-body materials, seals and internal trim selected according to:

Acid type
Acid concentration
Corrosion inhibitor
Operating temperature
H₂S exposure
CO₂ exposure
Chloride concentration

The valve is flushed and neutralized immediately after acid service.

Well Testing and Flowback

Well-test and flowback fluids can contain:

Formation sand
Residual proppant
Scale
Completion debris
Water
Hydrocarbon liquids
Gas
Corrosive contaminants

Flowback Check Valves receive scheduled inspection of:

Flapper or dart
Seat
Spring
Guide
Internal bore
Bonnet seal
End connections
Pressure-body wall thickness

Parallel Pump Protection

Check Valves are installed on parallel pump branches to prevent an operating pump from forcing pressure and fluid into a stopped pump.

This protection supports:

Independent pump startup
Independent pump shutdown
Isolation of a failed pump branch
Stable manifold pressure
Reduced reverse loading on fluid-end valves
Safer maintenance planning
Controlled multi-pump operation

The Check Valve is not treated as the only isolation barrier. A dedicated Plug Valve or other approved isolation valve is used for maintenance isolation.

Check Valve and Plug Valve Functions

A Check Valve closes automatically when flow reverses.

A Plug Valve is manually or remotely operated to create positive line isolation.

The two products perform different duties:

Check Valve: automatic backflow prevention
Plug Valve: controlled isolation
Emergency Relief Valve: overpressure protection

A complete high-pressure pump branch commonly uses all three products. GPE supplies matching Plug Valves and Emergency Relief Valves for integrated pressure-control layouts.

Trapped-Pressure Safety

A seated Check Valve can trap pressure between the Check Valve and a downstream Plug Valve or closed manifold valve.

Before maintenance:

Stop the pressure source.
Isolate the complete branch.
Open the approved bleed point.
Vent both sides of the Check Valve.
Verify zero pressure on both sides.
Confirm zero trapped pressure before removing the bonnet or body connection.

Loosening a union, flange or bonnet is not used as a pressure-bleeding method.

Forged Alloy-Steel Construction

GPE manufactures pressure-containing bodies from high-strength alloy-steel forgings.

Forged construction provides:

Stable mechanical properties
High pressure strength
Resistance to pressure pulsation
Resistance to mechanical impact
High fatigue strength
Controlled heat-treatment response
Consistent wall thickness
Reliable sealing and bonnet support

Internal closure components are manufactured from alloy steel, stainless steel or service-specific corrosion-resistant materials according to the approved design.

Manufacturing Process

Alloy-steel forging material verification
Heat-number assignment and traceability
Forging ultrasonic inspection
Rough body machining
Controlled quenching and tempering
Mechanical-property testing
Hardness inspection
Internal bore machining
Seat-pocket machining
Hinge, guide or dart-path machining
Bonnet-interface machining
Union or flange machining
Flapper, dart, spring and seat manufacturing
Seal-groove machining
Critical-area magnetic-particle inspection
Dimensional and wall-thickness inspection
Closure-component assembly
Bonnet or body assembly
Functional opening and closing inspection
Hydrostatic pressure-body testing
Forward-flow functional testing
Reverse-pressure closure testing
External leakage inspection
Permanent product marking
Documentation review
Export packaging

Quality Control

GPE quality control includes:

Raw-material certificate verification
Chemical-composition verification
Heat-number traceability
Heat-treatment records
Yield-strength testing
Tensile-strength testing
Elongation testing
Impact testing for specified low-temperature orders
Body hardness inspection
H₂S Service hardness inspection
Forging ultrasonic inspection
Magnetic-particle inspection
Internal-bore inspection
Pressure-body wall-thickness inspection
Seat-pocket dimensional inspection
Flapper-hinge inspection
Dart and guide inspection
Spring inspection
Bonnet-interface inspection
Union-end inspection
Flange inspection
Seal-groove inspection
Assembly-clearance inspection
Closure-movement inspection
Hydrostatic body testing
Reverse-pressure closure testing
Final visual inspection

Pressure and Functional Testing

Every GPE Check Valve receives:

Hydrostatic pressure-body test
Body and bonnet external leakage inspection
Forward opening test
Closure movement test
Reverse-pressure sealing test
Pressure-hold test
Flow-direction verification
Post-test internal inspection
Final marking inspection

The approved Inspection and Test Plan defines:

Test medium
Test pressure
Pressure ramp
Stabilization time
Hold time
Forward and reverse test direction
Acceptance criteria
Recording method
Customer or third-party witness point

Product Marking

Each valve is permanently marked with:

GPE identification
Product name
Valve structure
Nominal size
Working pressure
Flow-direction arrow
Inlet and outlet identification
End connection
Standard or H₂S Service
Temperature class
Valve serial number
Body heat number
Manufacturing date
Applicable product standard

Product Documentation

The order documentation includes:

Certificate of Conformity
Product datasheet
General arrangement drawing
Connection drawing
Material Test Certificate
Heat-treatment record
Mechanical-property report
Hardness report
Ultrasonic-inspection report
Magnetic-particle-inspection report
Dimensional-inspection report
Wall-thickness report
Hydrostatic body-test report
Reverse-pressure closure-test report
Functional-test report
Serial-number traceability list
Installation instructions
Operation and maintenance manual
Redress instructions
Spare-parts list
Packing list

Installation Requirements

Before installation:

Confirm the valve model and pressure class
Confirm the flow-direction arrow
Confirm the male and female connection orientation
Inspect union or flange sealing surfaces
Install the correct seal ring
Confirm line alignment
Support the valve and adjacent Flow Iron
Confirm bonnet service clearance
Confirm bleed and depressurization points
Confirm Standard or H₂S Service compatibility

The valve is installed with the body arrow pointing in the required forward-flow direction.

Routine Maintenance

Routine maintenance includes:

Cleaning the complete valve after service
Inspecting flow-direction marking
Inspecting external leakage
Inspecting union or flange connections
Verifying closure movement after depressurization
Inspecting the flapper, dart and seat
Inspecting spring condition
Inspecting hinge and guide components
Inspecting bonnet seals
Measuring internal wear
Measuring pressure-body wall thickness
Replacing worn internal components
Completing pressure testing after redressing

Top-Entry models are serviced through the bonnet only after both sides of the valve have been vented and verified at zero pressure.

Redress Kits and Spare Parts

GPE supplies:

Flapper assemblies
Rubber-coated flappers
Dart assemblies
Dart guides
Springs
Replaceable seats
Hinge pins
Stem and guide components
Bonnet seals
Body seals
Backup rings
Union seals
Bonnet assemblies
Retaining components
Complete internal kits
Complete seal kits
Complete valve redress kits

Each kit is identified by:

Valve model
Valve structure
Nominal size
Pressure class
Flow orientation
Standard or H₂S Service
Serial-number range

Common Failure Modes

Reverse Leakage

Primary causes:

Worn seat
Damaged flapper or dart
Solids trapped on the sealing surface
Spring failure
Hinge or guide damage
Incorrect closure alignment
Erosion
Corrosion

Corrective action:

Isolate and depressurize both sides
Inspect the closure element and seat
Remove trapped solids
Replace damaged components
Verify closure alignment
Complete reverse-pressure testing

Valve Does Not Open

Primary causes:

Incorrect flow direction
Excessive cracking pressure
Seized hinge
Corroded dart guide
Incorrect spring
Cement or solids accumulation
Pressure below the required opening differential

Corrective action:

Confirm installation direction
Isolate and depressurize the valve
Clean the internal flow path
Inspect hinge, dart, guide and spring
Replace damaged components
Verify cracking pressure

Excessive Pressure Loss

Primary causes:

Dart structure selected for excessive flow
Undersized valve
Partially opened flapper
Internal solids accumulation
Damaged closure component
Incorrect bore
Excessive fluid velocity

Corrective action:

Review valve structure and size
Inspect the open position
Clean internal components
Replace damaged parts
Confirm system flow and pressure-drop requirements

Flapper Impact Damage

Primary causes:

Excessive flow velocity
Rapid pump startup
Uncontrolled pressure pulsation
Worn hinge components
Incorrect travel stop
Gas or two-phase flow

Corrective action:

Review startup procedure
Inspect hinge and travel stop
Replace damaged flapper components
Review the service fluid and valve selection
Complete functional and pressure testing

Trapped Pressure

Primary causes:

Check Valve closed against reverse pressure
Downstream Plug Valve closed
No bleed point
Incorrect isolation sequence

Corrective action:

Stop the pressure source
Use the approved bleed system
Vent both sides
Verify zero pressure
Revise the maintenance-isolation procedure

Why Pressure-Pumping Companies Select GPE

GPE provides:

2–4 in high-pressure non-return protection
Pressure classes up to 20,000 psi
In-Line, Top-Entry and Dart structures
Low-restriction flapper configurations
Service-in-place Top-Entry maintenance
Standard and H₂S Service
Replacement-compatible dimensions
Complete internal and redress kits
Pressure and functional test records
Long-term spare-parts support

Why Equipment Manufacturers Select GPE

GPE provides:

Pump and manifold integration
GA and connection drawings
Female-to-Male or Male-to-Female orientation
Hammer-union and API flange connections
Flow-direction engineering
Service-access planning
Skid and manifold integration
Customer-witnessed testing
Material and inspection documentation

How to Select the Correct Check Valve

Identify the protected upstream equipment.
Confirm the nominal flowline size.
Confirm the rated working pressure.
Select In-Line Swing, Top-Entry Flapper or Dart Type.
Confirm the maximum flow rate.
Confirm allowable pressure loss.
Confirm required cracking pressure.
Confirm Female-to-Male or Male-to-Female flow.
Define hammer-union or API flange connections.
Define Standard or H₂S Service.
State the operating-temperature range.
State the service fluid and solids content.
Confirm installation orientation.
Confirm maintenance-access requirements.
Confirm inspection and documentation requirements.
Confirm spare internal and redress-kit quantities.

Frequently Asked Questions

What sizes does GPE manufacture?

GPE manufactures 2, 3 and 4 in High-Pressure Check Valves.

What working-pressure classes are available?

GPE manufactures 6,000, 10,000, 15,000 and 20,000 psi configurations.

What types of Check Valve are available?

GPE manufactures:

In-Line Swing / Flapper Check Valves
Top-Entry Flapper Check Valves
Dart-Type Check Valves

What is the main function of the valve?

The valve permits forward flow and automatically blocks reverse pressure and fluid from returning toward the pump or upstream equipment.

Which structure has the lowest flow restriction?

The Swing / Flapper design provides the largest open flow area and lower normal-flow restriction.

Why select a Top-Entry Check Valve?

The Top-Entry design allows the internal flapper, seat and seals to be serviced through the bonnet while the pressure body remains installed in the flowline.

Why select a Dart-Type Check Valve?

The Dart-Type design provides rapid spring-assisted axial closure and controlled cracking pressure.

Does a Dart Check Valve create more pressure loss?

Yes. The dart and spring remain within the flow path, creating more normal-flow restriction than a full-opening flapper configuration.

What is the standard flow direction?

Female-to-Male forward flow is the standard arrangement. GPE also manufactures Male-to-Female reverse-flow configurations.

Which connection is used for 15K fracturing systems?

Fig 1502 hammer-union configurations are used in 15,000 psi fracturing Flow Iron systems.

Are API flanged Check Valves available?

Yes. GPE manufactures API flanged Top-Entry Check Valves for wellhead, tree, manifold and pressure-control equipment.

Does API Spec 6A apply to every GPE Check Valve?

API Spec 6A requirements apply to applicable check-valve configurations ordered within the wellhead and tree equipment scope.

Hammer-union Flow Iron Check Valves are manufactured according to GPE drawings, pressure class, service conditions and purchase specifications.

Can the Check Valve be used as an isolation valve for maintenance?

No. The Check Valve provides automatic backflow prevention. A dedicated Plug Valve or approved isolation valve is used for maintenance isolation.

Can pressure remain trapped behind a Check Valve?

Yes. Reverse pressure can remain trapped between a seated Check Valve and another closed valve. Both sides are vented and verified at zero pressure before maintenance.

Can GPE manufacture H₂S Service valves?

Yes. GPE manufactures H₂S Service configurations with controlled-hardness materials, qualified heat treatment and NACE MR0175 / ISO 15156 material selection.

Can the valve handle proppant-laden fracturing fluid?

Yes. GPE manufactures forged high-pressure configurations for fracturing service. Flapper, seat, hinge, dart and guide inspection intervals are controlled by flow rate, proppant loading and pumping history.

Can GPE manufacture replacement-compatible Check Valves?

Yes. GPE manufactures replacement valves from approved drawings, part numbers, dimensions and physical samples.

Are repair kits available?

Yes. GPE supplies flappers, darts, seats, springs, hinge parts, seals and complete redress kits.

What testing is completed before shipment?

Each valve receives hydrostatic body testing, forward-opening inspection, reverse-pressure closure testing and final functional inspection.

Request a High-Pressure Check Valve Proposal

GPE manufactures complete High-Pressure Check Valves and replacement components for Frac Pumps, plunger pumps, cementing units, pressure-control manifolds and Flow Iron systems.

Our manufacturing range includes:

2–4 in nominal sizes
6,000–20,000 psi pressure classes
In-Line Swing / Flapper design
Top-Entry Flapper design
Dart-Type spring-assisted design
Female-to-Male and Male-to-Female flow
Hammer-union and API flange connections
Standard and H₂S Service
Replacement-compatible dimensions
Complete material and pressure-test documentation
Internal, seal and redress kits

The Check Valve can be supplied as part of a complete GPE pressure-control package with Plug Valves, Swivel Joints and Emergency Relief Valves.

Request a Technical Quote:
https://gpepump.com/contact/

Email:
info@gpepump.com

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