LONGWELL’s fluid end accessories are available for most of the popular triplex mud pumps. CNC machining renders these accessories uniformly dimensional and interchangeable with OEM. The perfect exterior surface reflects our superior quality.

Fluid End
The introduction of each component is as follows:
The liners
are attached to the liner cage with buttress-threaded retainers.There are six sizes of liners with an increment of 10mm in I. D. All these liners are the same in O.D.
There are two kinds of liners: high grade liner and plain liner. The former is made of carbon steel. The inside of it is plated with high-chrome alloy-steel to have good wear ability. And the latter is made of low-carbon steel. The inside of it is cemented and hardened to enhance the surface hardness.
The piston rods
are connected to the crosshead extension rod by clamps for ease of quick-up service. It conform to SY5138-86 spec and are not subjected to wear. The piston are fastened with M39×3 locknut, supplied water by a centrifugal spray pump, and lubricated & cooled with water of inhibitor through an oil tank.
The valve pot covers
are attached to the flanges with buttress threads for quick-up assembly & disassembly. And the flanges are fastened to the fluid module with studs for the convenience of machining & maintaining the fluid module.
The taper of the valve seats
is 1:6. The bottom of the seats is provided with a shoulder to be suitable for high operating pressure.
The suction inlets
in the front of and on both sides of the pump, which are connected to the suction manifold. The three suction flanges are of 12″ASAB16.5-150PSI or 10″ASAB16.5-150PSI type.
The discharge pipe and the five-way flanges
are of 4″API-5000PSi6B type. The gaskets here are API’s R39.
The discharge pulsation dampener
is of spherical & pre-pressure type. Its maximum working pressure is 350kg/cm2 and its volume is 75litres (20 gallons). The inlet valve and the pressure gauge take 3/4″-14NPT and 1/4″-18 respectively.
The suction desurger
is of rubber-pipe & pre-pressure type. The flanges of it are of 12″ and 10″ASAB16.5-150PSI.