Ammonia special-purpose valve

Hydraulic emergency shut-off valve QDY421F-25/40

Product Features

1. Suitable for gas or liquid ammonia pipeline, a safety protection.When the pipeline leak occurs, use hand pump unloading, realizing remote control valve is closed.When a fire, high temperature melted the fusible plug, the valve automatically shut down.
2. On the principle of the check valve, one-way only cut off, the flow direction of medium when installation must be consistent with the body logo.
3. The state of delivery, the valve normally closed.Through the hand pump on the hydraulic cylinder, the valve opens.
4. Easy operation, the valve closed check fast.

Technical parameters

Technical parameters:

Nominal pressure MPa	2.5	4.0
Shell test pressure MPa	3.75	6.0
Seal test pressure MPa	2.75	4.4
Suitable temperature	- 40ºC ~ + 150ºC
Applicable medium	Ammonia, ammonia, vinyl chloride, refrigerant, etc
The standard of the flange	GB/T9113-2000
Manufacturing standards	JB/T9092-1999
Emergency cut-off time	10 ~ 30 seconds or less
Fusible plug melting temperature	75 + / - 5ºC
Oil cylinder suitable medium	Synthesis of spindle oil, transformer oil
Oil cylinder pressure MPa	4.0 ~ 6.0

Main components:

The valve body	The valve stem	The disc	spring	gasket	Oil cylinder	Sealing ring
WCB	20Cr13	20Cr13	20CrVA,1Cr18NI9	PTFE	20 '	NBR

Hydraulic emergency cut-off valve QDY421F - 25 nominal pressure PN2.5 MPa shape size and the connection size

DN	L	D	D1	D2	D3 convex	D4 concave	b	f	Z -	H1	H2
150	444	300	250	211	203	204	28	4.5	8 - phi 26	590	353
200	533	360	310	274	259	260	30	4.5	12 - phi 26	695	410
250	622	425	370	330	312	313	32	4.5	12-30	735	441

Ammonia special-purpose valve

Hydraulic emergency shut-off valve QDY421F-25/40

Product Features

Technical parameters

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