1. API 11B
2. Long service life;
3. Competitive price;
4. Best service,good quality
5. Size: 7/8-1 3/4"

Restructured from SINOPEC in 1997, Puyang Zhongshi Group Co., Ltd has 18 years manufacturing experience of petroleum machinery products till now, we have competitive prices of our main products of pumping unit,wellhead and Christmas tree,Subsurface sucker rod pump,Casing accessories like bow spring centralizer, solid rigid centralizer,float equipment, cementing plug etc.
We have 9 factories, more than 500 employees, and many kinds of production equipments.
We have certificates of API 5CT,6A,10D,11AX,11E, ISO 14001 and 9001.
With 10 years exporting experience,we have exported to more than 30 countries such as America,Canada,Russia,Venezuela,Columbia,Thailand,Indonesia ,UAE,Saudi Arabia,Kazakhstan etc.

Provide considerate services to minimize clients' worries.
(1) Assist clients to prepare for the first construction scheme;
(2) Install and debug the equipment;
(3) Train the first-line operators on site
(4) Examine the equipment regularly;
(5) Take initiative to eliminate the troubles rapidly at site;
(6) Distribute the guarantee fittings door-to-door
(7) Provide perfect service;
(8) Provide technical exchanging;
(9) Provide maintenance for big items.

The warranty for our product is one year provided normal service and maintenance conditions and it is calculated from the date of shipment. The warranty excludes misuse,modification,or service of product in negligence or abnormal conditions.
    The warranty is limited.The manufacturer reserves the right to deal with any damaged product that is returned to the service center within the warranty by means of refund, free repair or replacement.