Self-Operated Rear Pressure Regulating Valve

Keywords: metering pump accessories

Classification:

Self-operated regulating valve

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DESCRIPTION

Commodity name: Self-Operated Rear Pressure Regulating Valve

Features of self-operated rear pressure regulating valve:

In layman's terms, the self-operated post-valve pressure regulating valve controls the pressure behind the valve. It consists of a control valve, an actuator and a spring that sets the pressure. It is suitable for non-corrosive liquids, gases and steam, starting in the system pipeline. The function of pressure control behind the valve, when the pressure behind the valve increases, the control valve closes.

Self-operated rear pressure regulating valve structure

Self-operated rear pressure regulating valve parameters:

Technical Parameters
Nominal diameter	DN15、20、25、32、40、50、65、80、100、125、200、250mm
Nominal pressure	PN1.6、4.0MPa
Flange standard	ANSl, JIS, DIN, GB, JB (special ones can be provided by users)
Valve body material	Cast steel, stainless steel
Valve core material	Hard seal: stainless steel
Valve core material	Soft seal: stainless steel inlaid rubber ring
pressure balance	Stainless steel bellows (DN15-125), balanced diaphragm (DN150-250)

Working principle of self-operated rear pressure regulating valve:

The self-operated pressure regulating valve is used to control the pressure behind the valve. The mode of action of the pressure regulating valve is a pressure-closing type. The medium flows into the valve body in the direction of the arrow, is throttled by the valve core and valve seat, and is output. The other path passes through the condenser (the medium is steam). After cooling, it is introduced into the actuator to act on the diaphragm, causing the valve core to move accordingly to achieve the purpose of pressure reduction and pressure stabilization. If the pressure behind the valve increases, the force acting on the diaphragm increases, compressing the spring, driving the valve core, and reducing the valve opening until the pressure behind the valve drops to the set value. In the same way, if the pressure behind the valve decreases, the force acting on the diaphragm decreases, and the reaction force of the spring drives the valve core to increase the valve opening until the pressure behind the valve rises to the set value.

Temperature range of self-operated rear pressure regulating valve:

allowable operating temperature
Nominal diameter		15-125mm	150-250mm
Sealing type	Hard seal	≤150℃	≤140℃
		Cooling tank ≤200℃	Cooling tank and extension ≤200℃
		Cooling tank and heat dissipation ≤200℃	Cooling tank and extension ≤200℃
	Soft seal	≤150℃

Structure and composition
1	2	3	4	5	6	7	8	9	10	11	12
valve body	valve seat	valve shaft	cap	membrane cover	Diaphragm	spring	Adjusting nut	pressure tube	bellows	Balanced diaphragm	filling valve

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