Principle of pneumatic bellows globe valve:
Pneumatic bellows globe valve WJ641H is a pneumatic shut-off globe valve. Pneumatic bellows shut-off valve uses compressed air to drive the pneumatic piston actuator to drive the valve flap to achieve the purpose of opening and closing the valve to control the fluid and achieve remote control and automatic control. The pneumatic bellows shut-off valve is in working state: when the solenoid valve is powered on to open the air source, the valve opens; that is, when the solenoid valve is powered off, the solenoid valve automatically exhausts and the valve closes automatically. The pneumatic bellows valve is used in conjunction with a remote console (microcomputer) to control the opening and closing of the valve by using a gas source.
Model of pneumatic bellows globe valve:
Cast steel material: WJ641H-16C, WJ641H-25C, WJ641H-40C
Stainless steel material: WJ641W-16P, WJ641W-25P, WJ641W-40P
Features of pneumatic bellows globe valve WJ641H / W:
1. The bellows sealing structure is adopted, and the seal is changed to a static seal, which greatly improves the sealing performance;
2. Double seal is realized, stainless steel bellows protection seal, valve stem packing protection seal, if the bellows fails, the valve stem packing will also avoid leakage;
3. Ensure that the valve does not leak under the condition of high temperature and pressure and strong media penetration;
4. The sealing surface can be welded with stainless steel or cobalt-based hard alloy or using non-metallic materials, which form a combination of wear resistance, corrosion resistance, good anti-friction performance and long service life to meet various working conditions.
5. Make sure that the valve has no leakage or internal leakage.
Main performance parameters of pneumatic bellows globe valve:
Product Name: Pneumatic Bellow Globe Valve
Product model: WJ641F / H / Y, WJ611F / H / Y
Nominal diameter: DN15-DN400
Nominal pressure: PN1.0MPa ～ PN4.0MPa
Connection method: flange, thread, welding (butt welding, socket welding)
Drive method: pneumatic
Air source pressure: 0.4MPa ～ 0.7MPa
Mode of action: double acting (gas on, gas off) or single acting (normally open, normally closed)
Body material: carbon steel, stainless steel
Applicable medium: air, steam, thermal oil and flammable, explosive, toxic, radiation and other media