Shanghai Pneumatic Single Seat Pressure Regulating Valve

NegotiableUpdate on 03/10

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Overview

The Shanghai pneumatic single seat pressure regulating valve is a pressure balanced regulating valve that adopts a cage type sleeve guide and double sealing structure, and is equipped with a multi spring pneumatic diaphragm actuator. The actuator is low in height, light in weight, and easy to equip. The regulating valve core adopts a cage type sleeve core, which converts the gas source pressure into the linear displacement of the core, automatically controls the opening of the regulating valve, and achieves continuous pressure regulation of the fluid in the pipeline. Pneumatic pressure regulating valves have the advantages of compact structure, light weight, sensitive action, small pressure drop loss, large valve capacity, precise flow characteristics, and easy maintenance.

Product Details

Shanghai Pneumatic Single Seat Pressure Regulating ValveProduct Overview

ZJSYL pneumatic pressure regulating valve is a pressure balanced regulating valve, which adopts cage sleeve guidance, double sealing structure, and is equipped with a multi spring pneumatic diaphragm actuator. The actuator is low in height, light in weight, and easy to equip. The regulating valve core adopts a cage type sleeve core, which converts the gas source pressure into the linear displacement of the core, automatically controls the opening of the regulating valve, and achieves continuous pressure regulation of the fluid in the pipeline. Pneumatic pressure regulating valves have the advantages of compact structure, light weight, sensitive action, small pressure drop loss, large valve capacity, precise flow characteristics, and easy maintenance. Overall, it has the characteristics of stable operation, large allowable pressure difference, precise flow characteristics, and low noise. Pneumatic pressure regulating valves are particularly suitable for working environments that allow for small leaks and large pressure differences before and after the valve.

■Shanghai Pneumatic Single Seat Pressure Regulating ValveMain technical parameters

● Valve body

Valve body form	Direct Casting Ball Valve
Nominal Diameter	DN20～300mm
Nominal Pressure	PN1.6、2.5、4.0、6.4MPa
Flange Standard	GB/T9113、 JB/T79
connection type	Flanges (FF RF RTJ), welding (SW BW), threads (applicable for 1 inch or less)
Valve cover form	Standard Type -17~+230 ℃, High Temperature Type+230~+450 ℃, Low Temperature Type -60~-196 ℃, Bellows Sealed Type -40~+350 ℃
Cover type	Bolt compression type
sealing packing	V-shaped PTFE packing, PTFE impregnated asbestos packing, asbestos textile packing, graphite packing

Valve internals

valve core type	Cage type sleeve valve core
flow characteristics	Linear, equal percentage

●Execution mechanism and accessories, form of action

Type of actuator	ZHA/B multi spring membrane actuator
executor model	ZHA/B-22	ZHA/B-23	ZHAB-34	ZHA/B-45	ZHA/B-56
Effective area (cm2)	350	350	560	900	1400
Travel distance (mm)	10. 16	25	40	40, 60	100
Spring range (KPa)	20-100 (standard), 20-60, 60-100, 40-200, 80-240
Membrane material	Nitrile rubber with nylon cloth, ethylene propylene rubber with nylon cloth
gas supply pressure	140~400KPa
air source interface	RC1/4'
ambient temperature	-30～+70℃
Can be equipped with accessories	Positioner, air filter pressure reducer, holding valve, travel switch, valve position transmitter, handwheel mechanism, etc
mode of action	Gas closed type (B) - valve position open when gas is lost (FO); Pneumatic opening (K) - valve position closed in case of gas loss (FC)

■ Main component materials and structural diagram of pneumatic pressure regulating valve

1	valve body	WCB	CF8	CF8M	CF3M
2	shim	PTFE/metal graphite gasket
3	valve cage	304	304	316	316L
4	valve core	304	304	316	316L
5	guide bushing	304	304	316	316L
6	valve cover	WCB	CF8	CF8M	CF3M
7	valve stem	304	304	316	316L
8	filler	PTFE/flexible graphite
9	spring	65Mn	304	316	316L
10	nut	304	304	316	316L

Main performance indicators of pneumatic pressure regulating valve

project			without locator	locator
Basic error%			±5.0	±1.0
Return difference%			≤3.0	≤1.0
Dead zone%			≤3.0	≤0.4
Constant point deviation%	air open	Starting point	±2.5	±1.0
		Starting point	±5.0	±1.0
	Qi Guan	Starting point	±5.0	±1.0
		destination	±2.5	±1.0
Rated travel deviation%			≤2.5
Leakage rate L/h			0.01% x valve rated capacity
Adjustable range R			30：1