Knife Gate Valves Browse All 
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API Trim Chart
| API Trim Family | API Trim No. | Material Type | Nominal Trim | Stem | Disc/Wedge Surface | Seat Surface | Acceptable API Trim Alternatives |
|---|---|---|---|---|---|---|---|
| Martensitic Stainless Steel | 1* | 13Cr | 410 | 410 SS | F6 | 410 SS | – |
| Martensitic Stainless Steel | 8 | 13Cr | 410 Hardfaced | 410 SS | F6 | Stellite 6 | 5 |
| Martensitic Stainless Steel | 5 | 13Cr | 410 Full Hardfaced | 410 SS | Stellite 6 | Stellite 6 | – |
| Austenitic Stainless Steel | 10 | 18Cr-8Ni-Mo | 316 | 316 SS | 316 SS | 316 SS | 12 or 16 |
| Austenitic Stainless Steel | 12 | 18Cr-8Ni-Mo | 316 Hardfaced | 316 SS | 316 SS | Stellite 6 | 16 |
| Austenitic Stainless Steel | 16 | 18Cr-8Ni-Mo | 316 Full Hardfaced | 316 SS | Stellite 6 | Stellite 6 | – |
| Monel™ | 9 | Ni-Cu Alloy | Monel | Monel | Monel | Monel | – |
| Monel™ | 11 | Ni-Cu Alloy | Monel Hardfaced | Monel | Monel | Stellite 6 | – |
| Alloy 20 | 13 | 19Cr-29Ni | Alloy 20 | Alloy 20 | Alloy 20 | Alloy 20 | 14 |
| Alloy 20 | 14 | 19Cr-29Ni | Alloy 20 Hardfaced | Alloy 20 | Alloy 20 | Stellite 6 | – |
| Alloy 20 | 18 | 19Cr-29Ni | Alloy 20 Full Hardfaced | Alloy 20 | Stellite 6 | Stellite 6 | – |
| Hastelloy® C-276 | 19B | NiMo16Cr15W | Alloy C276 | Alloy C276 | Alloy C276 | Alloy C276 | – |
- *Trim 1 is listed as obsolete for API 600, and no longer included in API 602
- Trim 5A and 8A apply Ni-Cr alloy hardfacing instead of typical Co-Cr Stellite 6 hardfacing
- Trim materials noted are nominal, and data provided in this chart is for informational purposes only. Always consult API to verify information via current API publications and data
API Trim Chart
The API Trim Chart is a technical reference tool that helps to select the appropriate trim materials for valves based on their specific application requirements.
API 598 – Pressure Test Requirements
API 598 – Pressure Test Requirements is a standard that outlines the procedures for pressure testing valves to ensure their integrity and reliability.
API Valve Specifications
API Valve Specifications provide detailed guidelines for the design, manufacturing, and testing of valves used in various industries.
ASME Class to Cold Working Pressure
The ASME Class to Cold Working Pressure chart provides a reference for determining the pressure ratings of valves at various temperature levels.
NPS to DN to OD
This chart helps users accurately convert between these sizing standards, ensuring proper valve and pipe selection for their systems.
Pipe Schedule (Inches)
The Pipe Schedule (Inches) chart provides detailed information on the wall thickness of pipes across various nominal pipe sizes (NPS).
Trunnion Ball Valve Types
The Trunnion Ball Valve Types chart provides an overview of the different types of trunnion-mounted ball valves available.
Pressure (PSIG) – Temperature Ratings for Class 150 Valves
The Pressure (PSIG) – Temperature Ratings for Class 150 Valves chart provides the maximum allowable pressure ratings for Class 150 valves at various temperatures.
Pressure (PSIG) – Temperature Ratings for Class 300 Valves
The Pressure (PSIG) – Temperature Ratings for Class 300 Valves chart provides the maximum allowable pressure ratings for Class 300 valves at various temperatures.
Torque Conversion Chart
The Torque Conversion Chart provides a reference for converting torque values between different units, such as foot-pounds, inch-pounds, and Newton-meters.