27
2018
-
11
Common valves for reciprocating pumps - automatic valves
The suction and discharge valves on the hydraulic end of the pump are one of the essential components. Most of the reciprocating pump valves are automatic valves. In order to ensure the timely opening and closing and accurate operation of the valve when the high viscosity liquid is delivered, the forced valve is used. The automatic valve is a one-way check valve, which relies on the liquid pressure difference between the upper and lower sides of the valve, and is closed by the valve's own weight or spring force. It can be divided into a spring automatic valve (disc valve) and a weight valve (mostly a ball valve). Types. The spring automatic valve is mainly composed of a valve seat, a valve plate, a spring, and a lift limiter.
The function of the reciprocating pump valve is to periodically open and close with the reciprocating motion of the piston, and alternately connect or separate the suction and discharge lines of the pump from the liquid cylinder to form a normal working cycle.
Working requirements for reciprocating pump valves:
(1) The seal is reliable, and the valve has no leakage when it is closed.
(2) The opening and closing of the valve is timely, that is, the action should be coordinated and coordinated with the piston movement, and the closing speed and closing lag angle are not greater than the allowable value, thereby reducing the impact loss and back leakage loss of the valve.
(3) The hydraulic loss when the liquid flows through the valve should be minimal.
(4) The work is relatively stable, the noise is small, and the life is long.
(5) A material suitable for the transport medium is used and has a corresponding hardness to ensure sufficient strength and rigidity.
(6) The structure is simple, the assembly and disassembly is easy, the processability is good, and the maintenance is convenient.
Increasing the number of reciprocations of the piston n can reduce the volume and weight of the reciprocating pump, and is one of the important measures to obtain higher technical and economic indicators. However, the increase in the number of reciprocations is limited by the conditions of the suction cavitation. On the other hand, the movement speed of the pump valve and the inertia force of the valve will increase accordingly, and the slamming of the net during operation will increase. Parts such as work surfaces and seals are subject to large impact loads and are rapidly destroyed. Thus, the operational reliability and longevity of the valve is another major factor affecting the number of reciprocating pistons.
Scan into the official website of the mobile phone.
Contact Us
Sales Tel: +86-533-4175657
After-sales phone:+86-533-4152048
Fax: +86-533-4185577
Add: No. 32, Zhixin Road, Boshan District, Zibo City, Shandong Province, China
Website: www.deyuanpump.com
E-mail: sddeyuan@126.com
copyright © 2023 Shandong Deyuan Pump Co., Ltd.
