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

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��LCB	20Cr13	20Cr13	20CrVA,1Cr18NI9	PTFE	20 '	NBR

Standing with a hydraulic emergency cut-off valve QDY421F nominal pressure PN2.5 MPa overall dimensions

DN	L	D	D1	D2	D3 convex	D4 convex	b	f	Z -	H
25	160	115	85	65	57	58	16	4	4-14	262
32	180	140	100	76	65	66	18	4	4 - phi 18	245
40	200	150	110	84	75	76	18	4	4 - phi 18	321
50	230	165	125	99	87	88	20	4	4 - phi 18	346
80	310	200	160	132	120	121	24	4	8 - phi 18	435
100	350	235	190	156	149	150	24	4.5	8-22	460

Ammonia special-purpose valve

Hydraulic emergency shut-off valve QDY421F-25/40

Product Features

Technical parameters

Our strength

> About

> Services

> Contact