Product Introduction

This product is designed and manufactured by our factory's engineers with reference to advanced domestic and foreign similar products. The valve body features a streamlined design, ensuring low fluid resistance, large flow rate, and excellent sealing performance. Equipped with a solenoid valve-guided pipeline control system, it operates hydraulically and is commonly used for automatic control in water supply, drainage, and industrial systems, enabling remote operation of valve opening and closing. It can be additionally fitted with a speed control device. This product replaces large electric devices for gate valves and butterfly valves, offering advantages such as small size, light weight, easy maintenance, convenient operation, safety, and reliability. Welcome to purchase!

700X Piston Hydraulic Control Valve Product Diagram

Working Principle

When the water pump starts operating, the water flow at the inlet end enters the valve cover control chamber through needle valve 3 and check valve 1, and then is discharged to the outlet through check valve 2, solenoid pilot valve 7, and ball valve 8. When the valve disc opens to 10%, it touches the electrical control switch, at which point the solenoid pilot valve is energized and remains in a normally closed state. Due to the small opening of needle valve 3 (usually 1/4 turn open) and the smaller diameter of the inlet pipe compared to the outlet pipe, the discharge speed in the control chamber is higher than the water replenishment speed. As a result, the pressure in the control chamber decreases, and the inlet pressure lifts the main valve disc to supply a large amount of water downstream. When water supply needs to be stopped, before the water pump shuts down, the inlet pressure first closes 90% of the main valve. At this time, the solenoid pilot valve 7 is in a normally open state due to power failure. For the remaining 10%, the pressure in the upper water chamber gradually increases through the action of solenoid pilot valve 7 and check valves 1 and 2, eventually closing the main valve disc tightly. This can completely prevent water hammer, protect the water pump motor, and also achieve slow closing and noise reduction.