Gate valves are used to shut off the flow of liquids rather than for flow regulation. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low flow resistance. The size of the open flow path generally varies in a nonlinear manner as the gate is moved. This means that the flow rate does not change evenly with stem travel. Depending on the construction, a partially open gate can vibrate from the fluid flow.

Gate valves are mostly used with larger pipe diameters (from 2" to the largest pipelines) since they are less complex to construct than other types of valves in large sizes.

At high pressures, friction can become a problem. As the gate is pushed against its guiding rail by the pressure of the medium, it becomes harder to operate the valve. Large gate valves are sometimes fitted with a bypass controlled by a smaller valve to be able to reduce the pressure before operating the gate valve itself.

Gate valves without an extra sealing ring on the gate or the seat are used in applications where minor leaking of the valve is not an issue, such as heating circuits or sewer pipes.

 

Application
 

Quality Control

1) Checking the details before the production line operated
2) Have full inspection and routing inspection during mass production---In process quality control(IPQC)
3) Checking the goods after they are finished---- Final quality control(FQC)
4) Checking the goods after they are finished-----Outgoing quality control(OQC)

Hebei Junya Precision Machinery Co. Ltd is a high-tech enterprise combine designing, tooling developing, casting, machining, surface treatment, inspection, sales and service all together.  Founded in 2017, located in Huanghua, Hebei. Junya now covers an area of more than 5000 square meters.

With a massive research & development environment, Junya utilized market-leading technology and introduced various of advanced equipment to ensure the stringent  quality in production. 



Under a powerful management team, the company has growing to the group with more than 100 employees. Product offerings range from Stainless Steel Pipe Fitting, Quick Joint, Ball Valve, Check Valve, to Marine Hardware and Auto Parts. The material are 304, 304L, 316, 316L, SF8M, WCB, 1.4408, etc.

-Quality- -Creativity- -Consistency-
These words are Junya slogan, and also philosophy that drives the company to offer the superior service you are looking for.

1) Design assistance and full engineering support .
2) Professional at OEM & ODM parts .
3) Excellent after sales service. 
4) Advanced machine tools, CAD/CAM programming software.  
5) Prototype machining capabilities.
6) Strict quality control standards with a highly qualified inspection department .  
7) Continually upgrading and advancing our equipment to remain competitive .

8) Small quality is also available.