DN Series Pilot-Operated Self-Operated Regulation / Control Valve

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, CE, ISO9001
• Model NO.: ZZYVP
• Media: Gas, Oil, Water, Acid
• Standard: Standard
• Connection Mode: Flange
• Power: Pneumatic
• Material: Carbon Steel; Stainess Steel
• Type: Self-Operated
• Transport Package: Wooden Case
• Specification: DN15-DN250
• Trademark: ZHITAI
• Origin: China
• HS Code: 841239
• Production Capacity: 5000pieces

Product Description

Product Description

 Pilot-operated Self-operated Control Valve

Summary:
ZZYVP Pilot-operated type of pressure control valve is mainly composed of control valve, actuator and a command set pressure. Simply put, in general, the direct action of the valve control precision is not high. The purpose of having a conductor is to increase control accuracy. The  valve does not need additional energy, and the use of the medium (gas) itself as a power source, the introduction of the command of the test actuator, which is to control the pressure regulating valve spool position, and change the valve medium flow, to make the valve back end pressure (type B) or front end pressure (type K) remain constant.

 

Pilot-operated Self-operated Control Valve
Model	ZZYVP
Size	DN15~250mm
Structure Form	Straight-through Type
Body Material	Cast steel(WCB); Stainless Steel(304;316;316L)
Norminal Pressure	PN1.6; PN2.5; PN4.0MPa
Working Temperature	-30~-350ºC
Application Range	Non-corrosive liquids, gases and steam
Feature	The control accuracy is higher for one time than self force valve.

 

Body Specification
Nominal Diameter	DN20~200mm
Flange Standard	ANSI,JIS,GB,JB,DIN
Body Material	Cast steel; Fluorine PTFE(F46)
Working Temperature	-30~-350ºC
Plug Material	Stainless Steel(Metal-to-metal) Stainless steel inlaid with rubber ring(Soft Seal)
Pressure Balance	Stainless Steel Bellows(DN15-125) Balance Diaphragm(DN150-250)

 

Temperature Range of Control Valve
Allowable Working Temperature
Nominal diameter		DN15-125mm	DN150-250mm
Sealing Type	Metal-to-metal	≤150ºC	≤140ºC
		cooling tank≤200ºC	cooling tank&lengthen≤200ºC
		cooling tank&Heat dissipation≤350ºC	cooling tank&lengthen≤350ºC
	Soft Seal	≤150ºC

Features:
The pressure setting value of the self-operated pressure control valve with the conductor can be realized on the conductor. It can be adjusted at will during operation. The control precision is about one time higher than that of a direct operation of the self-valve, and it is suitable for high precision control occasions. Detection and execution components are made of high temperature resistant materials. It can also be used for high temperature (200 ° C) water vapor without any condenser.

Working principle:
As for the pilot-operated self-operated pressure control valve, when the pressure of the regulated medium increases, the pressure acting on the lower pressure of the main valve diaphragm is greater than the pressure above, and the spool moves upward to reduce the flow cross section. In this way, the pressure behind the valve drops slightly. Conversely, when the pressure of the regulated medium decreases, the pressure acting on the command diaphragm decreases.

Company Introduction:   
Zhitai Valve Co., Ltd is a member of Valve Association of Longwan District, is located in Longwan Central Industrial Zone, Wenzhou City. It'a professional technology company integrated with development, manufacturing, sales, and after-sales services of valve actuators and and self-controlled valves. Presently, our main products include: pneumatic actuators, pneumatic valves and pneumatic control valves; electric actuators, electeic valves and eletric control valves; automatic control products. Our products are widely applied in natural gas, electricity, petroleum, chemical, metallurgical, construction, pharmacy, paper, printing and dying. Zhitai series actuators and valves are the best choice for automatic fluid control engineering and equipment manufacturing. We sincerely welcome customers from home and abrode to visit us for supervision, communication and cooperation. It's a great honor for us to cooperate with you.