Product classification
 FHDQ emergency shut-off valve
FHDQ emergency shut-off valve
 Adjustable electric ball valve
Adjustable electric ball valve
 Special ball valve for liquid ammonia crane pipe
Special ball valve for liquid ammonia crane pipe
 FZT-1 fire-proof breathable cap
FZT-1 fire-proof breathable cap
 Three piece welded ball valve
Three piece welded ball valve
 Explosion proof emergency shut-off valve
Explosion proof emergency shut-off valve
 Soft seal wafer butterfly valve
Soft seal wafer butterfly valve
 Stainless steel PFA fluorine lined ball valve
Stainless steel PFA fluorine lined ball valve
 Chlorine lined fluorine ball valve
Chlorine lined fluorine ball valve
 Explosion proof electric control valve
Explosion proof electric control valve
 ZHQ-I Flame Arrestor
ZHQ-I Flame Arrestor
 Automatic gas shut-off valve
Automatic gas shut-off valve
 Electric low-temperature ball valve
Electric low-temperature ball valve
 P11H-16P Automatic exhaust valve
P11H-16P Automatic exhaust valve
 Liquid ammonia emergency shut-off valve
Liquid ammonia emergency shut-off valve
 Pub bottom discharge ball valve
Pub bottom discharge ball valve
 Electric emergency shut-off valve
Electric emergency shut-off valve
 SCZ50-A fire retardant vent cap
SCZ50-A fire retardant vent cap

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  • Mobile: 15900658318
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  • Email: 1257073858@qq.com
  • Address: Nanting Highway, Fengxian District, Shanghai
  • 2788
 Liquid ammonia shut-off valve

Liquid ammonia shut-off valve

  • Valve model: QDQ421F-25C
  • Diameter specification: DN25~DN100
  • Structure: normally closed
  • Valve body material: WCB carbon steel, CF8/304 stainless steel
  • Nominal pressure: PN1.6MPa, PN2.5MPa, PN4.0MPa
  • Applicable temperature: - 30/+80 ℃
  • Scope of application: liquid ammonia, liquefied gas, gas, oil
  • Product features: high temperature automatic fusing and pressure relief closing
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product details
Liquid ammonia shut-off valve
Alternative name: liquid ammonia pneumatic cut-off valve pneumatic liquid ammonia cut-off valve pneumatic emergency cut-off valve liquid ammonia emergency cut-off valve ammonia emergency cut-off valve ammonia emergency cut-off valve
English: Liquid ammonia cut off valve
Overview of liquid ammonia shut-off valve:
The liquid ammonia shut-off valve is composed of pneumatic piston actuator, valve, signal feedback device, explosion-proof solenoid valve, air filter pressure reducing valve, etc. After connection, installation and commissioning, the liquid ammonia pneumatic shut-off valve is formed. The pneumatic liquid ammonia shut-off valve uses compressed air/nitrogen as the power source, the cylinder as the actuator, and uses the explosion-proof solenoid valve to control the air source conversion to drive the opening and closing of the valve. The liquid ammonia emergency shut-off valve receives the control signal from the industrial automation control system to adjust various process parameters such as the flow, pressure and temperature of the pipeline medium. The special cut-off valve for liquid ammonia is characterized by simple control, rapid reaction, and intrinsic safety, without taking additional explosion-proof measures. It is one of the industrial process control instruments widely used in petroleum, chemical, power, metallurgy and other industries.
Accessories at the inlet of liquid ammonia shut-off valve include:
Japanese SMC/50-VFE3130-5t-02 explosion-proof solenoid valve, American ASCO/EF8551G401MO explosion-proof solenoid valve, Honeywell BXA3K-1A explosion-proof limit switch, Japanese SMC/AW20-02B-C-A air filter pressure reducing valve
Introduction to Shanghai Yonglong Valve Factory:
"YongLong" Shanghai Yonglong Valve Factory, reorganized in 2019, is a professional manufacturer engaged in the design, production and technical consultation of mechanical equipment such as liquid ammonia valves, gas valves, electric valves, pneumatic valves, intelligent control valves, and program control valves. With rich practical experience and perfect after-sales service system, "Yonglong Valve" customizes various specifications and types of electric shut-off valves, pneumatic shut-off valves and ammonia shut-off valves for customers. The products are widely used in power plant desulfurization and denitrification projects, ammonia station storage tanks, liquefied gas filling stations, oil depots/wharves, food refrigeration, gas boilers, electronic automation, security systems and other industries, For many years, the company has been committed to the refrigeration equipment industry. "Yonglong" is a reliable automatic control valve manufacturer.    
"YL" Yonglong's main leading products include: pneumatic emergency shut-off valve, pneumatic ball valve, pneumatic control valve, Electric emergency shut-off valve Ball Valve , electric control valve, hydraulic emergency cut-off valve, liquid ammonia emergency cut-off valve, gas emergency cut-off valve, low temperature emergency cut-off valve, ammonia emergency cut-off valve, ammonia emergency cut-off valve, ammonia stop valve, ammonia ball valve, ammonia check valve, ammonia flow limiting valve, liquid ammonia safety valve, liquid ammonia filter, ammonia needle valve, electro-hydraulic valve, fuse valve, pull off valve, flame retardant vent cap, Flame arrester, explosion-proof solenoid valve, fluorine lined ball valve, stainless steel ball valve, Low temperature ball valve And other supporting products.
Shanghai Yonglong, as a diversified industrial valve manufacturing enterprise, has a lofty goal and forge ahead as our philosophy. Our sustainable development strategy has been integrated into various fields of daily operation of the enterprise. We cooperate between different departments and positions to create opportunities, stimulate innovative thinking, and establish significant competitive advantages. Yonglong's core values are integrity, respect, collaboration, innovation and courage, which are the cornerstone of our foundation. We encourage employees to believe in the correct approach, and to take risks and responsibilities, so as to realize the potential of employees and technology to stimulate the progress of the enterprise.

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