• We manufacture and supply the deep oil well sucker rod pumps according to the API 11AX specifications of THC, THM, TLE, RWAC, RWBC, RHAC, RHBC, TP, RHAM, RHBM, RHTM, RHTC, RWBM, RXBC, RXBM, RWTC and RWTM
• Special pumps can be designed and manufactured such as hi-viscosity crude oil pumps, gas-proof pumps and sand-proof pumps according to the request of users
• Key parts of the pumps are made of materials with strong corrosion resistance and good mechanical properties conditions
• The valve balls and valve seats are made of different materials such as excellent corrosion-resisting stainless steel, tungsten carbide hardness alloy and metal ceramic
• Materials: AISI304, AISI316, AISI420C, AISI440.

• Symbol	Symbol	Hardness	Material
  A1	Stainless steel	Ball:58-65HRC  Seat: 52-56HRC	UNS 41000–UNS 44000
  B1	Cobalt alloy, cast	Ball: 56-63HRC  Seat: 50-56HRC	Cobalt, chromium, and tungsten alloy
  B2	Cobalt alloy, powder metal	Ball: 53-60HRC  Seat: 51-57HRC	Cobalt, chromium, and tungsten alloy
  C1	Tungsten carbide	Ball: 88-89HRA Seat: 88-89.5HRA	Tungsten with Cobalt binder
  C3	Titanium carbide	Ball: 89-90.5HRA  Seat: 89-90.5HRA	Tungsten and titanium carbide with cobalt binder

All products purchased in our company are guaranteed to keep in good repair for one year. If quality problems happen in

guarantee period, our company will maintain for free. Additionally, our company provides technical support and fittings for

life. After-sales service isn't restricted by time and we will assign technical personnel to solve your problems immediately

after receiving telephone and hear feedback idea of users and deal with them in time. If you are caught in some problems

when using our products, welcome to contact us at any time.

 Puyang Zhongshi Group Co., Ltd. was founded in 1996, which is the restructured enterprise of Central Plains oilfield branch company of SINOPEC . The company registered capital is 60.83 million yuan, with annual output value 200 million yuan, 580 employees, including more than 160 technical and administrative staff . Oil machinery is our main products, the leading products include pumping unit, subsurface sucker rod pump, wellhead (Christmas Tree), pressure vessels, drilling solid control series products and cementing accessories.

Cynthia  Jiang

E-maile:    1461540332 at

                sale05 at

 Website:  

Mobile phone:    13839250964

 We will do best services for you

PUYANG ZHONGSHI GROUP Co,Ltd

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