Quick answer: Mud pump liner size must be matched to the exact pump model, piston size, pressure requirement and fluid-end configuration. GPEPUMP supplies metal/bimetal and ceramic liners for F-Series, PZ-Series, 3NB, UNBT and other supported drilling mud pumps, with matched pistons and replacement confirmation by model, part number, dimensions, drawing or sample.
Mud Pump Liner Size & Compatibility Quick Chart
| Pump Family | Model | Power | Stroke | Rated SPM | Published / Common Liner Range | Max. Bore | GPEPUMP Supply |
|---|---|---|---|---|---|---|---|
| F-Series | F-500 | 500 HP | 7.5" | 165 | Common replacement sizes up to 6-3/4" | 6-3/4" / ~170 mm | ✓ |
| F-Series | F-800 | 800 HP | 9" | 150 | Approx. 4"–6-3/4" / 100–170 mm published series | 6-3/4" / ~170 mm | ✓ |
| F-Series | F-1000 | 1,000 HP | 10" | 140 | Approx. 4"–6-3/4" / 100–170 mm published series | 6-3/4" / ~170 mm | ✓ |
| F-Series | F-1300 | 1,300 HP | 12" | 120 | Common published bore series up to 7" | 7" / ~180 mm | ✓ |
| F-Series | F-1600 | 1,600 HP | 12" | 120 | Common published bore series up to 7" | 7" / ~180 mm | ✓ |
| PZ-Series | PZ-7 / PZG | 550 HP | 7" | 145 | 4"–7" published performance/replacement range | 7" / ~178 mm | ✓ |
| PZ-Series | PZ-8 / PZH | 750 HP | 8" | 145 | 4"–7" published performance range | 7" / ~178 mm | ✓ |
| PZ-Series | PZ-9 / PZJ | 1,000 HP | 9" | 130 | 4", 4.5", 5", 5.5", 6", 6.25", 6.5", 7" | 7" / ~178 mm | ✓ |
| PZ-Series | PZ-10 / PZK | 1,350 HP | 10" | 115 | 4.5", 5", 5.5", 6", 6.5", 7" | 7" / ~178 mm | ✓ |
| PZ-Series | PZ-11 / PZL | 1,600 HP | 11" | 115 | 5", 5.5", 6", 6.5", 7" standard published series | 7" / ~178 mm | ✓ |
| 3NB | 3NB-1000 | 1,000 HP class | 305 mm | 110 | 120 / 130 / 140 / 150 / 160 / 170 mm | 170 mm | ✓ |
| 3NB | 3NB-1300 | 1,300 HP class | 305 mm | 120 | 130 / 140 / 150 / 160 / 170 / 180 / 190 mm | 190 mm | ✓ |
| 3NB | 3NB-1600 | 1,600 HP class | 305 mm | 120 | 140 / 150 / 160 / 170 / 180 / 190 mm standard series | 190 mm | ✓ |
| UNBT | UNBT-950 / 950A | Model dependent | Model dependent | Model dependent | Model / PN / configuration based | Confirm by model | ✓ |
| UNBT | UNBT-1180 / 1180L | Model dependent | Model dependent | Model dependent | Approx. 130–180 mm published replacement range; variants differ | Confirm by fluid end | ✓ |
| UNBT | UNBT-1600L | Model dependent | Model dependent | Model dependent | Model / PN / configuration based | Confirm by fluid end | ✓ |
F-Series Mud Pump Liner Size Chart
F-Series pumps use multiple liner bores to balance pressure and displacement. Smaller pumps such as F-500, F-800 and F-1000 commonly use bores up to approximately 6-3/4" (170 mm), while F-1300 and F-1600 configurations extend to approximately 7" (180 mm).
| Model | Published / Common Liner Bore | Max. Liner Bore | Metal / Bimetal | Ceramic | Matched Piston |
|---|---|---|---|---|---|
| F-500 | Multiple bore options up to 6-3/4" | 6-3/4" / ~170 mm | ✓ | ✓ | ✓ |
| F-800 | Approx. 4"–6-3/4" / 100–170 mm | 6-3/4" / ~170 mm | ✓ | ✓ | ✓ |
| F-1000 | Approx. 4"–6-3/4" / 100–170 mm | 6-3/4" / ~170 mm | ✓ | ✓ | ✓ |
| F-1300 | Published bore series up to 7" | 7" / ~180 mm | ✓ | ✓ | ✓ |
| F-1600 | Published bore series up to 7" | 7" / ~180 mm | ✓ | ✓ | ✓ |
| F-2200HL / supported high-power variants | Configuration dependent | Confirm by fluid end | ✓ | ✓ | ✓ |
GPEPUMP supplies metal mud pump liners, ceramic liner options and matched piston solutions for supported F-Series applications. For complete pump references, see the F-Series Mud Pump range.
PZ-Series Mud Pump Liner Size Chart
| PZ Model | Power | Stroke | Published / Common Liner Bore | Max. Bore | GPEPUMP Supply |
|---|---|---|---|---|---|
| PZ-7 / PZG | 550 HP | 7" | 4"–7" | 7" / ~178 mm | ✓ |
| PZ-8 / PZH | 750 HP | 8" | 4"–7" | 7" / ~178 mm | ✓ |
| PZ-9 / PZJ | 1,000 HP | 9" | 4", 4.5", 5", 5.5", 6", 6.25", 6.5", 7" | 7" / ~178 mm | ✓ |
| PZ-10 / PZK | 1,350 HP | 10" | 4.5", 5", 5.5", 6", 6.5", 7" | 7" / ~178 mm | ✓ |
| PZ-11 / PZL | 1,600 HP | 11" | 5", 5.5", 6", 6.5", 7" standard published series | 7" / ~178 mm | ✓ |
For PZ replacement sourcing, GPEPUMP can confirm compatibility using the exact pump model, existing liner bore, reference part number, drawing, dimensions or sample. Liners can be quoted together with pistons, valves, seats and other PZ mud pump spare parts.
3NB Mud Pump Liner Size Chart
3NB liner sizing is commonly published in millimeters. Keeping the metric bore series in the data table reduces conversion errors during replacement sourcing.
| 3NB Model | Published Liner Bore Series | Max. Published Bore | Metal / Bimetal | Ceramic | Matched Piston |
|---|---|---|---|---|---|
| 3NB-1000 | 120 / 130 / 140 / 150 / 160 / 170 mm | 170 mm | ✓ | ✓ | ✓ |
| 3NB-1300 | 130 / 140 / 150 / 160 / 170 / 180 / 190 mm | 190 mm | ✓ | ✓ | ✓ |
| 3NB-1600 | 140 / 150 / 160 / 170 / 180 / 190 mm standard published series | 190 mm | ✓ | ✓ | ✓ |
| 3NB-1600H / high-pressure variants | Published configurations may extend from 120 to 190 mm | 190 mm | ✓ | ✓ | ✓ |
GPEPUMP also supplies 3NB Series mud pumps and corresponding replacement wear parts.
UNBT Mud Pump Liner Compatibility
UNBT and related Russian-style pump families are best matched by exact model, part number and fluid-end configuration because public replacement catalogs can show different bore ranges for different variants.
| Pump / Family | Published Replacement Evidence | Recommended Confirmation | GPEPUMP Supply |
|---|---|---|---|
| UNB / UNBT-600 | 160 mm and other model-based replacements are publicly listed | Model + PN + dimensions | ✓ |
| UNBT-950 / 950A | Model / OEM-reference based replacement liners | Model + PN + liner bore | ✓ |
| UNBT-1180 | Approx. 130–180 mm published replacement range | Model + bore + dimensions | ✓ |
| UNBT-1180L | Approx. 140–180 mm widely published; variants differ | Model + fluid end + PN | ✓ |
| UNBT-1180L-52 | 140–180 mm / 52 MPa replacement configurations published | Exact high-pressure configuration | ✓ |
| UNBT-1600L | Model / PN / drawing-based replacement | Full technical confirmation | ✓ |
Mud Pump Liner Bore to Matching Piston Size
| Liner Bore | Approx. Metric | Nominal Matching Piston | Final Check |
|---|---|---|---|
| 4" | 101.6 mm | 4" | Pump model + piston hub / rod connection |
| 4-1/2" | 114.3 mm | 4-1/2" | Pump model + elastomer + piston design |
| 5" | 127.0 mm | 5" | Pump model + operating condition |
| 5-1/2" | 139.7 mm | 5-1/2" | Pump model + piston material |
| 6" | 152.4 mm | 6" | Pump model + fluid-end configuration |
| 6-1/4" | 158.8 mm | 6-1/4" | Pump model + existing piston data |
| 6-1/2" | 165.1 mm | 6-1/2" | Pump model + replacement geometry |
| 6-3/4" | 171.5 mm | 6-3/4" | Pump model + final compatibility review |
| 7" | 177.8 mm | 7" | Pump model + pressure / flow requirement |
For piston material, wear and interchangeability details, see the GPEPUMP Mud Pump Piston guide.
Need Liner Size Confirmation for Your Pump?
Send GPEPUMP your pump model, existing liner bore, piston size, part number, drawing or old sample. We can confirm the replacement route before quotation.
How Does Liner Size Affect Mud Pump Pressure and Flow?
F-1600 Liner Size, Flow & Pressure Reference
The following is a published-style performance reference for a standard 5,000 psi F-1600-type configuration at 120 SPM. It shows why the liner bore must be selected together with the required pressure and displacement.
| F-1600 Liner Bore | Approx. Flow @ 120 SPM | Reference Max. Pressure |
|---|---|---|
| 4" | 235 GPM | 5,000 psi |
| 4-1/2" | 294 GPM | 5,000 psi |
| 5" | 367 GPM | 5,000 psi |
| 5-1/4" | 404 GPM | 5,000 psi |
| 5-1/2" | 444 GPM | 5,000 psi |
| 5-3/4" | 486 GPM | 5,000 psi |
| 6" | 529 GPM | 4,665 psi |
| 6-1/4" | 574 GPM | 4,299 psi |
| 6-1/2" | 620 GPM | 3,981 psi |
| 6-3/4" | 670 GPM | 3,688 psi |
| 7" | 720 GPM | 3,423 psi |
What does this mean for an F-1600?
A 5" liner provides much less displacement than a 7" liner, but it can operate at a higher pressure limit in a standard 5,000 psi configuration. A 7" liner increases flow significantly but is pressure-limited by the pump’s power / rod-load relationship before reaching 5,000 psi.
F-1600 High-Pressure 7,500 PSI Fluid-End Example
A high-pressure fluid-end upgrade changes the pressure ceiling, but it does not mean every liner size can operate at 7,500 psi. Larger bores remain limited by power and rod load.
| Liner / Piston | Approx. Flow @ 120 SPM | Reference Max. Pressure |
|---|---|---|
| 4-1/2" | 297 GPM | 7,500 psi |
| 5" | 367 GPM | 6,723 psi |
| 5-1/2" | 444 GPM | 5,556 psi |
| 6" | 529 GPM | 4,669 psi |
| 6-1/2" | 620 GPM | 3,978 psi |
| 7" | 720 GPM | 3,430 psi |
PZ-11 Liner Size, Flow & Pressure Reference
The PZ-11 / PZL is a useful example because its standard published performance clearly shows the trade-off between liner bore, pressure and displacement at a rated speed of 115 SPM.
| PZ-11 Liner Bore | Approx. Metric | Flow @ 115 SPM | Reference Max. Pressure |
|---|---|---|---|
| 5" | 127 mm | 323 GPM | 5,000 psi |
| 5-1/2" | 140 mm | 390 GPM | 5,000 psi |
| 6" | 152 mm | 465 GPM | 5,000 psi |
| 6-1/4" | 159 mm | 504 GPM | 4,899 psi |
| 6-1/2" | 165 mm | 545 GPM | 4,529 psi |
| 6-3/4" | 171 mm | 588 GPM | 4,200 psi |
| 7" | 178 mm | 632 GPM | 3,905 psi |
PZ-11 High-Pressure 7,500 PSI Fluid-End Example
| PZ-11 Liner Bore | Flow @ 115 SPM | Reference Max. Pressure |
|---|---|---|
| 5" | 322.7 GPM | 7,500 psi |
| 5-1/4" | 355.7 GPM | 6,942 psi |
| 5-1/2" | 390.3 GPM | 6,326 psi |
| 5-3/4" | 426.7 GPM | 5,787 psi |
| 6" | 464.4 GPM | 5,317 psi |
| 6-1/4" | 504.0 GPM | 4,899 psi |
| 6-1/2" | 545.1 GPM | 4,530 psi |
| 6-3/4" | 587.7 GPM | 4,200 psi |
Can the Same Mud Pump Use Different Liner Sizes?
Yes. Many drilling mud pumps are designed to operate with several liner bores. The selected bore changes pump displacement and the pressure available within the pump’s power, rod-load and fluid-end limits.
Required Pressure
Higher pressure requirements usually move the selection toward a smaller liner bore, subject to the fluid-end rating.
Required Flow
Higher displacement usually moves the selection toward a larger liner bore.
Pump Power
Horsepower and rod-load limits determine how much pressure can be generated at a given bore.
SPM
Pump speed directly affects displacement and must be included when comparing GPM values.
Piston
The nominal piston size must match the selected liner bore and correct pump configuration.
Fluid End
A 5,000 psi fluid end and a 7,500 psi fluid end can have different allowable operating envelopes.
Are Mud Pump Liners Interchangeable Between Brands?
If you have an existing part number, old liner, drawing or sample, see How to Source a Replacement Mud Pump Liner by Model, Part Number, Drawing or Sample.
Metal/Bimetal vs Ceramic Availability by Pump Family
| Pump Family | Metal / Bimetal | Ceramic | Matched Piston | GPEPUMP Technical Confirmation |
|---|---|---|---|---|
| F-Series | ✓ | ✓ | ✓ | ✓ |
| PZ-Series | ✓ | ✓ | ✓ | ✓ |
| 3NB | ✓ | ✓ | ✓ | ✓ |
| UNBT | ✓ | ✓ | ✓ | ✓ |
This page only addresses compatibility and availability. Material selection by abrasiveness, service life, impact resistance and total cost is handled separately in the ceramic-vs-metal liner guide.
How GPEPUMP Confirms the Correct Liner Size
F, PZ, 3NB, UNBT or another supported system.
Identify the precise pump model and fluid-end configuration.
Confirm the required or existing nominal bore.
Cross-reference the existing OEM / reference PN when available.
Confirm nominal size, design and elastomer requirement.
Check the operating point against pump and fluid-end limits.
Select metal/bimetal or ceramic based on the application.
Use dimensions, drawing or sample review when necessary.
GPEPUMP Mud Pump Liner Supply Capability
GPEPUMP supports replacement liner sourcing as part of a broader mud pump system and spare-parts supply program.
What Should You Send for Liner Size Confirmation?
| Information | Why It Helps |
|---|---|
| Pump manufacturer / existing brand | Identifies the product family and reference system |
| Exact pump model | Primary compatibility reference |
| Existing liner bore | Confirms nominal size |
| Existing piston size | Confirms liner-piston relationship |
| OEM / reference part number | Supports cross-reference |
| Required pressure | Helps select the correct bore and fluid-end operating range |
| Required flow / SPM | Supports displacement selection |
| Drawing / dimensions | Confirms fit and interchangeability |
| Old sample / photos | Useful for legacy or poorly documented replacements |
| Quantity | Required for production and quotation planning |
Mud Pump Liner Size & Compatibility Questions
What size liner does an F-1600 mud pump use?
F-1600 pumps commonly use multiple liner bores up to approximately 7" / 180 mm. The exact bore should be selected based on the required pressure, flow, piston size and fluid-end configuration.
What is the maximum liner size for an F-1300?
Published F-1300 specifications commonly show a maximum liner bore of approximately 7" / 180 mm, with multiple smaller bore options available for higher-pressure operating points.
What liner sizes are used on PZ-9 mud pumps?
Published PZ-9 replacement references commonly include 4", 4-1/2", 5", 5-1/2", 6", 6-1/4", 6-1/2" and 7" liners.
Does GPEPUMP supply PZ-11 mud pump liners?
Yes. GPEPUMP supports PZ-Series mud pumps and corresponding replacement parts, including PZ-11 liner and piston matching based on the exact model and fluid-end configuration.
What liner sizes are used on 3NB-1600 pumps?
Published 3NB-1600 performance series commonly include 140, 150, 160, 170, 180 and 190 mm liners, while some high-pressure variants publish a wider series. Final compatibility should be confirmed by the exact pump configuration.
Does piston size match the liner bore?
The nominal piston diameter normally matches the nominal liner bore, but final interchangeability also depends on piston design, rod connection, elastomer, liner geometry and pump model.
Can one mud pump use different liner sizes?
Yes. Many mud pumps use multiple liner bores to balance pressure and displacement. Smaller bores support higher pressure capability, while larger bores increase displacement.
Does a smaller liner always increase mud pump pressure?
A smaller liner can increase pressure capability within the pump’s power-end, rod-load and fluid-end limits. It cannot raise the rated pressure of a fluid end beyond its design limit.
Does a larger liner increase mud pump flow?
Yes, at the same stroke and SPM, a larger liner bore increases displacement. The trade-off is lower available pressure within the same power and rod-load limits.
Can I install a ceramic liner in place of a metal liner of the same nominal size?
It may be possible when all critical dimensions, sealing surfaces, piston relationship and pump configuration match. Material substitution should still be reviewed for the operating condition.
Are F-Series liners interchangeable between different manufacturers?
They may be interchangeable when the critical dimensions and pump configuration match. Model name and nominal bore alone are not sufficient for final confirmation.
Can GPEPUMP confirm liner size from a part number?
Yes. GPEPUMP can use an OEM/reference part number as a cross-reference and confirm it against the pump model, bore, dimensions, drawing or sample when required.
Can GPEPUMP manufacture a non-standard replacement liner?
GPEPUMP can review non-standard or legacy liner requirements using dimensions, drawings, operating information or a physical sample before production.
Need the Correct Liner Size for Your Mud Pump?
Send GPEPUMP your pump model, liner bore, piston size, part number, operating pressure, drawing or sample. We can confirm the replacement configuration and quote the liner together with matched pistons or other mud pump spare parts.