Multi-stage piston type compressor
Multi-stage piston type compressor
Non-return valve for admitting a liquid to be sprayed into a pum
Oil well pump
Oil well pump
Oil well pump
Oil well pump
Oil well pump
Oil well pump traveling valve
Oil well pump with plunger pull down and desanding assembly
Oil well pump with radially expandable interlocking seal ring
Oil well pump with resilient plunger cup means
Oil well pump with self-contained lubrication
Oil well sucker rod shock absorber
One-piece connector assembly
Packing assembly and reciprocating plunger pump...
Piston and seals for a reciprocating pump
Piston for a piston pump with a two part inlet valve body
Piston machine with ported piston head
Piston mechanism with a flow passage through the piston