Delivery Time:7-15 working days after received your payment
Certification:CE,TRCU,ISO9001

Oil / Water / Steam Automatic Control Valve with Cast Stainless Steel JIS DIN GB

Pneumatic diaphram intelligent high differential pressure control valve

YSIQ(D)70 Series of Intelligent High DP Control Valve mainly used for power plant high pressure boiler occasions which feed water need to be regulated, in case cavitation, cavitation erosion happened when valve is on small opening.

Working principle:

    The equipped smart positioner will convert to valve required settings when receive normal signal of electricity or signal of computer. Then the pneumatic actuator linear displacement will change to angular displacement by valve special connections, and tested by position transducer then feedback to microprocessor.

    The microprocessor will compare the actual valve feedback with original settings and tested if there is any deviation. It will output pulse width modulation command(PWM) to piezoelectric valve according to the the size and direction of deviation. The piezoelectric valve will regulate the input or exhaust gas under the control command.

Main Parts Materials                                                                Table 1

Item	Part Name	Material
1	Body	WCB	WC6	CF8	CF8M
2	Seat	304,316/Partial Stellite	316/Partial Stellite
3	Plug	Metal Sealing	304,316/Partial Stellite	316/Partial Stellite
Soft Sealing	304,316+Reinforced Teflon	316+Reinforced Teflon
4	Cage	304,316	316
5	Guide Sleeve/Silencing Cover	304,316	316
6	Stem	304,316	316
7	Bonnet	WCB	WC6	CF8	CF8M

*Above is the common materials,the specific grades take the contract as a standard.

Specification&Technical Parameter                                                   Table 2                          

Type	Pressure Balanced Low Noise
Nominal Diameter	DN40～DN400(1-1/2”～16”)
Nominal Pressure	PN16,25,40,64,100(150lb,300lb,600lb)
Flow Characteristic	Equal Percentage, Linear
Rangeability	50﹕1
Bonnet Form	Standard Type:Cast Steel :-20～250℃   Stainless Steel:-40～250℃
Low-Temp. Type:Cast Stainless Steel:-60～-100℃,-100～-200℃,-200～-250℃
Seat Leakage	ANSI Ⅳ,V

Main Performance Index                                                            Table 3

No.	Item	Standard Type	Fin-Extension Type, Low-Temp. Type
1	Basic Error＜(%)	±1	±2.5
2	Hysteresis＜(%)	1	2.5
3	Dead Band＜(%)	0.4	1
4	Start &End Deviation＜(%)	±1	±2.5