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MTHJA52 Dual Pins Shear Relief Safety Valve - High Pressure Mud Pump from Reliable 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 Pressure | 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 & 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 Inspection | Bureau Veritas (BV), CCS, ABS, SJS 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.
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In single pin configuration, the valve withstands up to 31 MPa, while in dual pins configuration, the maximum working pressure reaches 59.6 MPa.
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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.
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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 systems.
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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 Us
Contact for more details about the safety valves which are used for global mud pump brands.
Contact for more details about the safety valves which are used for global mud pump brands.
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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 (FAQ)
Q
What is the maximum working pressure of the MTHJA52 shear relief valve?
The MTHJA52 supports a maximum working pressure of 8700 PSI (60 MPa). In dual shear pin configuration, it can handle up to 59.6 MPa, while in single pin configuration the limit is 31 MPa.
Q
What is the difference between single and dual shear pin configurations?
The single pin configuration is suited for lower-pressure applications (up to 31 MPa), while the dual pin configuration extends protection up to 59.6 MPa. Operators can switch between configurations on-site to match the rated pressure of the cylinder bore, offering greater operational flexibility.
Q
What types of drilling fluids is this valve compatible with?
The MTHJA52 is designed to operate with water-based, oil-based, and highly corrosive drilling fluids commonly used in oilfield drilling operations. The HNBR rubber components provide excellent chemical and temperature resistance.
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What connection types are available for the MTHJA52?
Both flanged end connections and hammer union type connections are available for the bottom and bypass outlets, making the valve compatible with a wide range of drilling system configurations and field requirements.
Q
What is the expected service life of this shear relief valve?
With correct maintenance and timely replacement of shear pins, the valve is designed for more than 12,000–18,000 working hours, which is equivalent to approximately 2–3 years under typical drilling conditions.
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What quality standards and certifications does the MTHJA52 comply with?
The MTHJA52 is produced under the API Q1 / ISO 9001 quality management system. Third-party witness and inspection reports are available from recognized bodies including Bureau Veritas (BV), CCS, ABS, and SJS.