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China, Chinese Cylinder Head (Lock/Cap) for Drilling/Mud Pump 3nb-350/500/800/1000/1300/16001 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Mud Circulating SystemMud Pump SealAccessories
Shandong Rongye Machinery Co., Ltd.
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Product DescriptionSpecificationCylinder Head(Lock/Cap) 3NB-350/500/800/1000/1300/1600The cylinder head, also commonly known as the liner lock or cap, is a major threaded component in the fluid end of a triplex mud pump. It screws into the rear of the valve box bore and serves two primary functions. First, it acts as a retaining device, physically holding the liner in place axially within the valve box (working in conjunction with the clamp assembly which provides radial locking). Second, it houses the piston rod packing (a set of sealing rings) and provides the necessary compression on that packing via a follower or gland to create a seal around the reciprocating piston rod. This component is subjected to high pressure from the mud and significant mechanical stress from the packing load and the tightening torque. It is therefore manufactured from high-strength forged alloy steel, and its large internal threads (often Acme or buttress type for strength) must be precisely machined. Proper installation and tightening of the cylinder head are critical. It must be tightened to the manufacturer's specified torque to ensure the liner is securely held and the packing is properly compressed without being over-tightened, which can damage the threads, the head, or the valve box. The threads and sealing surfaces must be kept clean and lubricated with anti-seize compound during installation to prevent galling and facilitate future removal. A damaged or worn cylinder head can lead to liner movement, packing failure, and high-pressure leaks. It is a robust but wear-prone component that requires inspection for thread wear, cracks, or erosion during fluid end overhauls.Mud pump parts brand and model availableBrandModelBOMCOF-500,F-800,F-1000,F1300,F1600,FB-1300,FB-1600,D-375,D-700LANSHI3NB-1300C,3NB-1000,3NB-1000C,3NB-800QINGZHOUSL3NB-1300A,QZ-1000,QZ-500,QZ-350,QZ-800,SL3NB-1600HONGHUA3NB-1600F,HHF800/1000,HHF1300/1600,HHF1600HL,HHF2200HLDRILLMEC7TS450,7TS600,9T800,9T1000,10T1300,12T1600EMSCOF-500,F-800,F-1000,F1300,F1600,FB-1300,FB-1600,FC-1600,FC-2200IDECOT-500,T-800,T-1000,T-1300,T-1600GARDNERDENVERPZ-7,PZ-8,PZ-9,PZ-10,PZ-11NATIONAL7-P-50,8-P-80,9-P-100,10-P-130,12-P-160,14-P-200,14-P-220,K-700,K-700A,K-500,K-500AOILWELLA-350PT,A-560PT,A-600PT,A-850PT,A-1100P,A-1400PT,A-1700PTELLIS WILLIAMSW-440-LP,E-447,E-2200,W446,W440RUSSIAN8T-650,UNBT-600,UNBT-950,UNBT-1180L,UNBT-950A,UBT-400,BT-600,UB-590,UNB-600,8T-310
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