gate valve

1. Product name: Z41Y forged steel flange gate valve

Forged steel flange gate valve is composed of valve body, bonnet, gate, handwheel and other important components. The opening and closing part of the gate valve is the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and is not suitable for adjustment and throttling. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used wedge gate valve form a wedge shape, and the wedge angle varies with the valve parameters, usually 5°. Usually, there are trapezoidal threads on the lift rod. Through the nut at the top of the valve and the guide groove on the valve body, the rotary motion is changed into a linear motion, that is, the operating torque is changed into an operating thrust. For some valves, the valve stem nut is set on the gate, and the rotation of the handwheel drives the valve stem to rotate, which makes the gate lift. This kind of valve is called a rotating stem gate valve or a dark stem gate valve.

2. Forged steel flange gate valve – material description of main parts

Flange standards conform to API 602, MSS-SP-118 (standards available) and ANSI B16.34, B35352. Inspection and testing according to API598, marking according to MSS-Sp-25. with the following structure

Full diameter or reduced diameter

Structure length according to ANSI B16.10

Flange size according to ANSI B16.5

pressure self-tightening bonnet

Rising rod bracket type (OS&Y)

Self-centering pressure plate pressure sleeve type


Overall sealing seat

Integral Body Flange

Butt weld ends meet ASME B16.25

RTJ valve body bonnet connection form

Bolted connection, spiral wound gasket sealing bonnet, threaded connection, all welded sealing bonnet and threaded connection internal pressure self-tightening sealing bonnet