• Model NO.：QYB35-175L
• Colour：Customer Requirement
• Transport Package：Container
• Specification：3 1,8",3 1,2",4 1,8",4 3,4",5",6",6 1,4′,6 1,2",6
• Trademark：UPET
• Origin：China
• HS Code：73061900
• Production Capacity：200000 PCS,Year

Basic Info.

Model NO. QYB35-175L Colour Customer Requirement Transport Package Container Specification 3 1/8",3 1/2",4 1/8",4 3/4",5",6",,6 1/4′,6 1/2",6 Trademark UPET Origin China HS Code 73061900 Production Capacity 200000 PCS/Year

Product Description

QYB35-175L pneumatic oil pump
1 Overview
QYB35-175L pneumatic oil pump is a high pressure and large displacement oil pump that converts air pressure into hydraulic power. It is controlled by pneumatic components and is mainly used in systems that use hydraulic oil as the medium. When the electric pump fails, the power is cut off or the power is not allowed, the oil pump can be started, and the hydraulic system can be quickly filled with oil. It is an auxiliary pump on the BOP control device.
2. Main technical parameters
Model:QYB35-175L
Working pressure:21Mpa (3000psi)
Air source pressure:0.53~0.8Mpa(75~115psi)
Theoretical displacement :175ml/punch
Liquid-gas ratio:50:1
Weight:40kg(88.1 lb)
3. Structure and working principle
QYB35-175L pneumatic oil pump is mainly composed of the following parts:
Pump head, valve core connecting rod, trachea assembly, valve core, valve core sleeve, pump head seat, valve core rod, piston rod nut, piston, piston rod assembly, cylinder, valve core rod retaining ring, spring, base, column Plug rod assembly, body, plunger rod sealing assembly, plunger cylinder sealing assembly, plunger cylinder assembly, steel balls B1, B2, polyurethane sealing ring B3, etc.
Compressed air enters the upper cavity of the cylinder from the air inlet of the pump head through the valve core sleeve, the lower air inlet on the valve core, the two air inlets at the lower end of the pump head, and the air inlet of the pump head seat, pushing the piston down. At the same time, the air in the lower chamber of the cylinder enters the exhaust chamber of the pump head through the air intake hole and air pipe assembly of the base and is discharged from the exhaust port. The piston drives the plunger rod assembly down through the piston rod assembly. At this time, the steel ball B1 moves up, and the steel ball B2 closes the oil suction port, and the pressure oil enters the upper cavity of the plunger cylinder (component) and is pressed out through the oil discharge port of the body. When the piston moves down to the piston rod nut and contacts the spool rod retaining ring, it continues to move downwards. The piston drives the spool down by a pitch through the spool rod and the spool connecting rod. At this time, the upper part of the spool moves downwards. The air port is closed, and the upper air inlet is connected with the upper air inlet cavity of the pump head to realize the reversal.
at this time. Compressed air passes through the valve core sleeve from the air inlet of the pump head. The upper air inlet on the valve core, the air pipe and the air inlet of the base enter the lower cavity of the cylinder, pushing the piston upward, and the air in the upper cavity of the cylinder passes through the pump head seat. , The exhaust cavity of the pump head is discharged from the exhaust hole. At the same time, the piston drives the plunger rod assembly upward through the piston rod assembly. At this time, the steel ball B2 moves upward, and the hydraulic oil enters the lower cavity of the cylinder from the oil suction port, and the steel ball B1 is closed. The pressure oil in the upper cavity of the plunger cylinder assembly is pressed out from the oil discharge port of the body. When the piston moves up to the spring and hits the bottom end surface of the inner hole of the piston rod assembly, it continues to move up. At this time, the piston drives the valve core to move up a pitch through the valve core rod and the valve core connecting rod. At this time, the lower part of the valve core The air inlet is in communication with the lower air inlet cavity of the pump head, and compressed air enters the upper cavity of the cylinder to realize the direction change. In this way, the direction of the airflow entering the cylinder is reciprocated, and the piston and the piston rod assembly continuously reciprocate up and down. At the same time, the plunger rod assembly is also driven to reciprocate up and down to realize the oil suction and discharge process of the pump.
1. Features and instructions
           The working characteristics of the pneumatic oil pump are: intermittent oil suction, continuous oil discharge, stable start, and load start.
           The ratio of the area of the cylinder of the pneumatic oil pump to the annular end face of the cylinder cavity is 50:1. Therefore, the theoretical ratio of the intake pressure to the discharge pressure is 1:50. When the air source pressure is 0.53~0.8Mpa (75~115psi), the theoretical maximum output oil pressure can reach 26.5~40Mpa (3850~5800psi).
           The oil discharge and air consumption of the pneumatic oil pump are both unstable, but change with the load pressure. When the load pressure is low, the pump strokes increase, and the oil discharge and air consumption increase; when the load pressure is high, the pump strokes decrease, and the oil discharge and air consumption decrease.










Company Information
UPET OILFIELD EQUIPMENTS CO.,LTD is one of the most well-known suppliers for the oilfield equipments in China, was established in 2000, and now has grown up to a star company which is not big but very strong in this field with our persistant effort step by step in the past years.Our products refer to the whole areas of oilfields, from a very small spare part to a very big complete rig system. Our main products are: pump spare parts, mud pumps&packages, DC/AC Motors, solid control equipments, power units, truck-mounted rigs, workover rigs, land rigs, drilling pipes and drilling tools etc. All of our products are manufactured according to the API Standard, and we are authorized to use API monogram.
Our products have been exported to 15 countries& areas around the world, 80% of our exsisting customers have done the business with us by more than 5 times, no one-off customer. We will continue to expand our range, and win more customers' trust with our better and better performance.
We welcome the win-win cooperation relationship with the partners from any places in the world, each customer is our god and helper. Warmly welcome you to come to China and visit us!
With us, you will save money, time, trouble, and most important point is that you can sleep better.