Mud Pump Parts Expert
​Mud Pump Pistons
Piston assembly is the important spare parts and expendable parts of oil drilling mud pumps.
It’s composed of Snap spring, retainer, piston cup and piston hub.
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We offer a full line of pistons assembly for duplex and triplex mud pumps. All types are fully interchangeable with API standard designed pistons and deliver maximum performance in almost all drilling conditions.
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Piston size is available from 4” to 7-1/2”.
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There are two types of pistons:
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Bonded pistons: Vulcanizing piston cup on piston hub directly, and don’t need press plate and snap spring to fix.
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Replaceable pistons: can remove the piston cup, and the pistons are fixed by press plate and snap ring.
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Someone also distinguish the pistons by single action piston and double action piston. The double action piston is often used in Russian pumps.
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Material of piston hub: forged by 45# steel or 40Cr with hardening and tempering
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Material of piston cup: urethane
NBR rubber
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Surface treatment of piston hub: by phosphating and by Oxidizing
Bonded Piston
super premium piston:
Someone also calls supreme piston; high temperature resistance piston.
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one piece bonded constructed piston, no joints, no leakage.
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Material of piston cup: urethane material
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Service life: ≥400 hours
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Suitable for zirconial ceramic liner and high pressure mud pump
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Good performance under extreme drilling conditions
bonded urethane piston:
Someone also calls piston assembly with PU cup, bonded piston with polyurethane
cup, bonded piston with urethane, and urethane bonded piston.
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one piece bonded constructed piston, no joints, no leakage.
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Service life: ≥200 hours and ≥300 hours
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Material of piston cup: urethane material
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This type is the most commonly used one.
bonded rubber piston:
Someone also calls rubber bonded piston, bonded piston with rubber
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one piece bonded constructed piston
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Material of piston rubber: NBR
Replaceable Piston
replaceable urethane pistons:
Also named piston with replaceable urethane
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It’s composed of Snap spring, retainer, piston cup and piston hub.
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Piston cup can be removed
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Material of piston cup: urethane
replaceable rubber pistons:
Also named piston with replaceable rubber
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It’s composed of Snap spring, retainer, piston cup and piston hub.
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Piston cup can be removed
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Material of piston cup: NBR
Double Action Piston
Piston Rubber (Cup)
