J641h Pneumatic Flange Globe Valve

• Customized: Customized
• Certification: ISO, API, CE
• Power: Pneumatic
• Pressure: Medium Pressure
• Brand: Xuan Cheng
• Work Temperature: Normal Temperature
• Model NO.: J641H
• Material: Carbon Steel
• Medium: Water, Steam, Gas, etc
• Structure: Through
• Connection Mode: Flange
• Seal: Hard Seal
• Transport Package: Wooden Box
• Specification: DN15-DN800
• Trademark: xc
• Origin: China
• HS Code: 8412310090
• Production Capacity: 10000

Product Description

Pneumatic flange globe valve overview
Pneumatic flange globe valve J641H-16C is mainly composed of flange globe valve and pneumatic actuator, pneumatic control components, signal switch, (can be equipped with handwheel mechanism) and other related parts connected and composed, is a kind of automatic control equipment driven by compressed air, driven by the air source into the pneumatic actuator cylinder, connected to the stem spool valve disc to do lifting movement. Pneumatic flange globe valve body (valve disc) and valve seat sealing surface with conical seal, small closing force, erosion resistance, reliable sealing. The seat can be a replacement seat, can be any combination with the sealing material of the closing part of the pair, in order to meet the requirements of the working condition, prolong the service life.
Pneumatic globe valve actuator
Flange pneumatic cast steel globe valve pneumatic actuators are generally pneumatic spring piston type and pneumatic cylinder piston type, the former is a single acting spring return type, the latter is a double acting gas closed gas open type. Pneumatic flange globe valve adopts self-sealing working principle, the medium enters the valve chamber from above the disc, under the action of medium pressure, the closing force of the globe valve is small, and the opening force is large, the diameter of the valve stem can correspondingly reduce the impact force of the fluid. At the same time, under the action of medium pressure, this form of valve is also tight. Pneumatic globe valve is generally fully open and fully closed, not recommended to do throttling and regulation use.
Pneumatic flange globe valve technical parameters

Nominal diameter	DN50 to DN300
Nominal pressure	PN1.6, 2.5, 4.0, 6.4MPa
Control mode	Pneumatic control (air source drive)
Connection form	Flange type
Gland type	Bolt press type
Flange standard	National standard
Operating temperature	- 29 ºC to 550 ºC
Range of use	Water, oil, steam and other media

Pneumatic flange globe valve principle
Pneumatic globe valve using compressed air to push the actuator in the movement of multiple groups of combined pneumatic piston, transfer force to the beam and the characteristics of the inner curve track, drive the hollow spindle for rotating movement, compressed air disc to the cylinder, change the inlet and outlet gas position to change the direction of spindle rotation, according to the requirements of the load globe valve rotation torque, can adjust the number of cylinder combinations, drive the load globe valve work.
Pneumatic flange globe valve design standard

Design and manufacture	GB/T12235
Structural length	GB/T12221
Flange dimensions	JB/T79