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High Pressure Mud Pump Dual Pins Shear Relief Safety Valve - China Suppliers & Factory
Product Specifications
| Product model | MTHJA52 |
| Application | Installed at the discharge end of the drilling mud pump to safeguard the system against overpressure. |
| Valve type | Dual Shear Pins Type |
| Max. Working pressures | 8700 PSI (60 MPa) |
| Temperature rating | -29°C to 120°C |
| Valve Body material | Forged alloy steel 35CrMo (Equivalent to AISI 4135) |
| Material of piston rubber and Cushion pad | Hydrogenated Nitrile Butadiene Rubber (HNBR) |
| Service life | With correct maintenance and timely replacement of shear pins, designed for more than 12,000~18,000 working hours, equivalent to 2~3 years under typical drilling conditions. |
| Standard | Produced under API Q1 / ISO 9001 quality management system |
| Applicable Fluids | Designed to operate with both water-based, oil-based and highly corrosive drilling fluids commonly used in oilfield drilling operations |
| Third party witness and inspection report available | Bureau Veritas (BV), CCS, ABS, SGS etc. |
Product Features
The shear relief valve is primarily installed in high pressure mud pump discharge end, where overpressure protection is critical. It acts as a safeguard by releasing pressure when unexpected surges occur, preventing damage to pumps, liners, and downstream components. The dual shear pin design is especially suitable for deep drilling and high pressure applications that demand precise and reliable safety control.
In single pin configuration, the valve withstands up to 31 MPa, while in dual pins configuration, the maximum working pressure reaches 59.6 MPa.
The flexibility of switching between single and dual shear pins allows onsite operators to select the appropriate protection level based on the rated pressure of the cylinder bore, while the shear pin insertion position is engineered for straightforward adjustment.
Connection options are designed to adapt to different field requirements. Both flanged ends and hammer union type connections are available for the bottom and bypass outlets, ensuring compatibility with a wide range of drilling system.
By applying our own research and engineering expertise, the dual shear pin design offers a balance of safety assurance and operational adaptability that traditional single pin models cannot achieve.
Contact for more details about the safety valves which used for global mud pump brands.
All product names, trademarks, and part numbers are used for identification purposes only and are the property of their respective owners. We are an authorized and recognized supplier, if you are looking for specific mud pump safety valve part numbers, please contact our sales team for detailed references or technical support.
Frequently Asked Questions
Q: Where is the MTHJA52 shear relief valve typically installed?
It is installed at the discharge end of the high-pressure drilling mud pump to safeguard the system against unexpected overpressure surges.
Q: What is the maximum working pressure of this shear relief valve?
The valve can handle a maximum working pressure of 8700 PSI (60 MPa). In a single pin configuration, it withstands up to 31 MPa, while the dual pins configuration reaches up to 59.6 MPa.
Q: What materials are used to construct the valve body and sealing components?
The valve body is made of forged alloy steel 35CrMo (equivalent to AISI 4135). The piston rubber and cushion pad are made of high-quality Hydrogenated Nitrile Butadiene Rubber (HNBR).
Q: What is the expected service life of the valve?
With correct maintenance and timely replacement of the shear pins, it is designed for more than 12,000 to 18,000 working hours, which is equivalent to 2 to 3 years under typical drilling conditions.
Q: What types of fluids is this valve compatible with?
It is designed to operate with water-based, oil-based, and highly corrosive drilling fluids commonly used in oilfield drilling operations.
Q: Are third-party certification and inspection reports available?
Yes, third-party witness and inspection reports are available from recognized agencies including Bureau Veritas (BV), CCS, ABS, and SGS.