Motorized Non Rising Stem Gate Valve

Model: Z940H/Y

Review

Description

Brief Introduction

Traditional gate valve sealing structure has a big problem, the structure is inelastic, single gate seal, sealing surface is easy to scratch and leak, and also because of the casting steel valve body and gate internal stress is not completely eliminated, in the course of use, due to the impact of time and temperature, the valve body and the gate seal surface will deform under the action of its own internal stress, once the deformation happened, wedge gate sealing surface and the valve seat sealing surface can not fully contact each other, the sealing does not meet the requirements.

Our company introduced the United States advanced technology, the gate we use is a flexible structure, both sides the central around of the gate is made with specified elastic groove, so that the gate has a certain flexibility. When valve seat two side sealing surface and wedge gate sealing surface slightly deformed and can not be completely meet each other, elastic groove can be used to adjust sealing, completely solve the traditional structural defects. (See Figure Below)

Compact structure, reasonable design, good valve rigidity, smooth flow path, flow resistance coefficient is small. Sealing surface uses stainless steel and hard alloy, long service life. With flexible graphite packing, sealing is reliable, and easy to operate. Actuator could be manual, electric, pneumatic, gear box. Structural type: Elastic wedge single gate, rigid wedge single gate and double gate model. Widely used in petrochemical, thermal power plants and other oil, water pipe as a connect or cut off device.

Main Material

Body, Bonnet	Gate	Seat	Stem	Packing	Medium	Temperature
WCB	WCB+D507Mo	D577	2Cr13	Flexible graphite	Water, oil, steam	≤425℃
ZG1Cr5Mo	ZG1Cr5Mo+Stellite12	1Cr18Ni9+Stellite6	25Cr2Mo1VA	Flexible graphite	Water, oil, steam	≤550℃
ZG1Cr18Ni9Ti	Cr1Ni2	1Cr18Ni9+Stellite6	1Cr18Ni9Ti	PTFE	Nitric acid, alkali	≤200℃
ZG00Cr17Ni14Mo2	316L+ Stellite12	316L+ Stellite6	316L	PTFE	Urea, methylamine, phosphoric acid	≤200℃