Piston assembly is the major part of the mud pump fluid end. The discharge pressure of mud pump is generated by the up-and-down motion of the piston in the cylinder. 
Our liners can be used in various drilling operation conditions. Double metal liner coat used in forging steel production, inner the coat of premium liners is made from forged blank. Endotheca is made of the centrifugal casting high chromium materials, and the inner sleeve reach HB285-330 after normalizing. Honing roughness can reach more than Ra0.8 after grinding. Our product has the characteristics of the wear resistance, corrosion resistance,high precision and long service life. Our products can be fitted to all souts of conditions.

API 6A Check Valve, also referred to non-return valve, or one-way valve, is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. We can produce both swing type check valve and lift type check valve. Available in bore sizes from 1-13/16" to 7-1/16" and pressure ratings from 2,000 to 15,000 PSI. The standard material is forged AISI4130 alloy. All of our Check Valves are fully designed, manufactured, and tested as per API 6A and API 16C standards and have been widely used on oilfield wellhead Christmas tree and manifolds with reliable performance. 

Accumulator unit for BOP stacks is a very important equipment which controls BOP stacks and gate valves controlled by hydraulic pressure especially in drilling and workover operations. It is necessary to accurately operate and maintain the hydraulic control system. It consists of remote control system, driller’s panel, air cable (except electrical type), pipe rack (electrical warming system available for cold area), high pressure manifold, protection room, etc.