Product Introduction

The 300X diaphragm type slow closing check valve is a new type of check valve developed by our technical personnel based on advanced products of the same type at home and abroad. This valve has the characteristics of novel structure, reasonable design, good sealing effect, low fluid resistance, high flow rate, and long service life. Due to the installation of a conduit control system on the main valve and the use of hydraulic automatic operation, the main valve can achieve the best opening or closing speed, thereby preventing the occurrence of water hammer and water hammer, and achieving the effect of slow closing and noise reduction. It is an ideal product for high-rise building water supply systems. Welcome to purchase!

Product diagram of 300X diaphragm type slow closing check valve

working principle

When the water pump starts working, the water flow at the inlet end of the valve passes through the micro filter 16, needle valve 15, one-way valve 14, enters the control room of the valve cover, and then is discharged to the outlet through the ball valve 6. Due to the small opening of needle valve 15 (usually 1/4 turn) and the smaller diameter of the inlet duct compared to the outlet duct, the discharge rate in the control room is greater than the water replenishment rate at the inlet. As a result, the pressure in the control room decreases, and the inlet pressure that has been acting under the main valve disc 5 lifts the main valve disc, thereby opening the main valve to supply water downstream. When the water supply is stopped, the downstream water begins to flow back. Due to the weight of the valve disc 5 and the pressure in the upper water chamber, 90% of the shut-off port is quickly closed, and the remaining 10% is transmitted to the upper water chamber through a conduit. Due to the action of the one-way valve 14, the water in the upper water chamber cannot flow out, so the pressure in the water chamber gradually increases, and the valve stem slowly moves down. Finally, the main valve disc is tightly closed, preventing downstream water from flowing back and playing a role in slow closing and noise reduction. (This is the working principle of diaphragm type, and the same applies to piston type.)