Zsqk Gas Special Cut-off Valve

• Temperature: Ordinary Temperature
• Certification: GS
• Media: Gas, Oil, Water, Acid
• Standard: Standard
• Connection Mode: Flange
• Power: Manual
• Model NO.: ZSQK
• Material: Stainless Steel
• Type: Self-Operated
• Use: Adjust
• Pressure: Normal Pressure
• Port of Ningbo: Class IV (Standard, Metal Seat)
• Body Type: Straight Through, Angle, Z Shape
• Transport Package: Wooden Box
• Specification: DN15-DN500
• Trademark: xc
• Origin: China
• HS Code: 8481804090
• Production Capacity: 10000

Product Description

 

Gas special cut-off valve ZSQK
 

I. Product Overview:
Gas special cut off valve by pneumatic multi-spring piston actuator and low flow resistance, double sealing structure of the cut off valve. The actuator has fast action speed, large thrust, self-reset function and hand operation mechanism; The valve body flow path is smooth, the flow coefficient is large, the spool seat has elastic and rigid cascade double seal. The novel structure makes this product a new type of high performance cutting valve with fast action, tight cutting off, safety and reliability.
 

2. Performance characteristics:
Excellent performance, complete specifications, small size, light weight. It can meet the requirements of automatic fast discharge and emergency cutting in the production process of chemical, petroleum, metallurgy and other industrial sectors. It is suitable for the safety of production process and equipment. The protection system is also suitable for general two-position control and switching operation.
 

Three, the working principle:
When the signal pressure is zero, due to the pre-tightening force of the spring (single action only), the spool is in the initial state (normally open or normally closed). When the actuator receives the signal pressure (0.4~0.6MPa), the spring is compressed to drive the push rod, valve body and spool to move to the limit position, so that the pneumatic cut-off valve is fully open or fully closed. To achieve the medium in the pipeline through, cut off or pipe switching control. With two-position three-way electric sample valve, the control of piston type cut-off valve is more convenient and simple.
 



 
Four, parts materials:

Material code		C (WCB)	P (304)	R (316)
Major Parts	Body, bonnet	WCB (ZG230-450)	ZG1Cr18Ni9Ti (304)	ZG1Cr18Ni12Mo2Ti (316)
	Spool and seat	1Cr18Ni9Ti (304) or Steilai alloy surfacing	Surfacing with 1Cr18Ni9Ti (304) or Stilley alloy	1Cr18Ni12Mo2Ti (316) or Stilley alloy surfacing
	Valve stem	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
	Stuffing	V-type PTFE (F4), flexible graphite,
	Gasket	Reinforced Tef-lon (F4), stainless steel gasket, metal graphite wrap gasket
	O-ring seal	Oil-resistant rubber
	Spring	60Si2Mn
	Putter	2Cr13
	Handwheel	HT200
Applicable conditions	Suitable medium	Water vapor oil gas liquid	Nitrate-base corrosive gas liquids	Acetic acid and other corrosive gas liquids
	Applicable temperature	Hard seal: -30 ~ +450ºC Soft seal: -30 ~ +180ºC

 
 
V. Technical parameters:

Nominal diameter mm	20	25	40		50	65	80	100	150		200
Valve seat diameter mm	20	25	32	40	50	65	80	100	125	150	200
Rated flow factor Kv	6.5	10	15	25	40	65	100	150	260	350	540
Nominal pressure MPa	1.6; 4.0; 6.4
Row length mm	10		16			25		30	40		60
Flow characteristic	Quick-opening
Actuator type number	ZSPA/B-1, ZSNA/B-1					ZSPA/B-2, ZSNA/B-2			ZSPA/B-3, ZSNA/B-3
Form of action	Single acting/double acting
Air source pressure MPa	0.4-0.7
Amount of leak	Soft seal :O leak; Hard seal: 10-5 x rated capacity of the valve
Cut-off time S	0.5		1			1.5		2	3		4