Stainless steel hydraulic shut-off valve Hydraulic stainless steel liquid ammonia shut-off valve
Alternative name: emergency stop valve hydraulic emergency stop valve hydraulic gas emergency stop valve liquid ammonia hydraulic emergency stop valve ammonia hydraulic emergency stop valve
Model: QDY421F-25/40P QDY421F-25/40C
The emergency shut-off valve is a protective valve for storage tanks in gas filling station, liquefied gas station and ammonia station. The function of remote control or automatic pressure relief and closing at high ambient temperature to prevent leakage during loading and unloading plays a key role in protecting the safety facilities of storage tanks. In pneumatic and hydraulic shut-off valve actuator devices [fusible alloy plug], the temperature around the working condition is higher than 75± At 5 ℃, the fusible alloy is softened and dissolved, the pressure is discharged from the plug hole, the spring pushes the piston back, and the cut-off valve closes quickly.
Technical parameters of stainless steel hydraulic shut-off valve:
| Nominal pressure MPa | two point five | four |
| Shell test pressure MPa | three point seven five | six |
| Sealing test pressure MPa | two point seven five | four point four |
| Applicable temperature | -40℃~+150℃ |
| Applicable media | Ammonia, liquid ammonia, liquefied gas, refrigerant, etc |
| Flange standard | GB/T9113-2000 |
| Manufacturing standard | JB/T9092-1999 |
| Emergency cut-off time | ≤ 5~10 seconds |
| Melting temperature of fusible plug | 75± 5℃ |
| Applicable medium of oil cylinder | Synthetic spindle oil, transformer oil |
| Cylinder pressure MPa | 4.0~6.0 |
Precautions for valve use and storage:
The valves shall be sealed with plugs or covers during daily storage and stored in a dry and ventilated room
Check frequently to remove dirt, and apply antirust oil on the machining surface to prevent rust.
The valve shall be cleaned before installation and all screw connections shall be tightened.
The valve adopts the principle of check valve, which can only be cut off in one direction. During installation, attention must be paid to the signs of valve flow path, and all parts of the valve must be protected from corrosion.
When ordering, flange sealing form, pressure rating and connection standard must be indicated.
“ YongLong” Related products of Shanghai shut-off valve manufacturer/Shanghai Yonglong Valve Factory: Pneumatic shut-off valve Electric shut-off valve Ammonia stop valve
Shanghai Yonglong Valve Factory, as a professional supplier in the field of high-end control valves and automatic control equipment, ranks among the best in the manufacturing process of shut-off valves. We choose a long-term fixed partner with well-known brand accessories manufacturers, in the [electric shut-off valve ● pneumatic shut-off valve ● electric regulating valve ● pneumatic regulating valve ● electric ball valve ● pneumatic ball valve ● emergency shut-off valve series] Further promote the upgrade of accessory products. Yonglong Valve“ Strive for perfection and do your best;.
