30D01Y、30D01R self-operated (after-valve)pressure control valve

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30 series self operated control valve

E-mail: sunny@reowocv.com

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Product Description

The Self Acting Pressure Control Valve is designed for industrial fluid systems that require reliable and automatic pressure regulation. Without relying on complicated external control systems, this valve can respond to changes in process pressure and help maintain a more stable operating condition. Its self-operated structure makes it suitable for applications where continuous pressure control, simple operation, and dependable performance are important.

For industrial users, stable pressure management can help reduce process fluctuations, protect connected equipment, and improve overall system efficiency. The valve can be considered for different pressure-control applications in industrial pipelines and process systems. Its practical design supports easier installation, operation, and maintenance, making it a useful choice for users looking for an efficient pressure-control solution.

Summary
The V230D01/V231D01 self-operated (after-valve) pressure control valve is composed of the control valve, actuator and a spring used for pressure setting. It is suitable for controlling after-valve pressure in the pipes of non-corrosive liquids, gases and steams. When the after-valve pressure rises, the control valve is closed.
The main features are as follows:
1.It has the pressure balancing function with high sensitivity.
2.Low noise, reliable performance, free of maintenance
3.The standard modular design is adopted.
4.Various combined controls can be carried out through the assemblies.

Technical parameters andperformances

Body
DN		DN15、20、25、32、40、50、65、80、100、125、200、250mm
PN		PN1.6、4.0MPa
Flange standard		ANSI、JIS、DIN、GB、JB(special standards can be offered according to user requirements)
Body material		Cast iron(HT200),cast steel (ZG230-450),cast stainless steel (ZG1Cr18Ni9Ti,ZG1Cr18Ni12Mo2Ti)
Plug material	Hard seal	Stainless steel (1Cr18Ni9Ti,1Cr18Ni12Mo2Ti) Stainless steel embedded with rubber ring
	Soft seal
Pressure balancing		Stainless steel bellows(DN15~125),balanced diaphragm(DN150~250)

Actuator

Effective area	32※	80	250	630
Pressure setting range	0.8~1.6 0.3~1.2	0.1~0.6 0.05~0.3	0.015~0.15 0.01~0.07	0.005~0.035
Minimum differential pressure that ensures normal work of thepressure valve	≥0.05	≥0.04	≥0.01	≥0.005
Allowable maximum differential pressure between the upper and lower diaphragm chambers	2.0	1.25	0.4	0.15
Material	Diaphragm cover:galvanized steel sheet;diaphragm:EPDM or FKM with fiber
Control pipeline,connection	Copper pipe or steel pipe φ10X1(mm);ferrule connection:R1/4"

Note:※The pressure setting range corresponding to the effective area does not apply to valves with DN150-250.

Performance

Set value error	±8%
Allowable leakage(under stipulated testing conditions)	Hard seal	4x0.01% valve rated capacity
	Soft seal	DN15~50	DN65~125	DN150~250
		10 bubbles/min	20 bubbles/min	40 bubbles/min

30D01Y、30D01R self-operated (after-valve)pressure control valve

Structural figure

1	Body	2	Seat	3	Valve shaft	4	Bonnet	5	Diaphragm Cover	6	Diaphragm
7	Spring	8	Adjusting nut	9	Pressure pipe	10	Bellows	11	Balanced diaphragm	12	Charging valve

Allowable working temperature

DN		15~125mm	150~250mm
Seal type	Hard seal	≤150°C	≤140°C
		Cooling tank≤200°C	Cooling tank and extension ≤200°C
		Cooling tank and heat sink ≤350°C※	Cooling tank and extension ≤300°C※
	Soft seal	≤150°C

Note:※It indicates the allowable working temperature is valid only when the medium is steam and the bodywith PN40 shall be adopted when the temperature resistance is 350°C.

Rated flow coefficient, noise measuring coefficient, allowable differential pressure

DN		15	20	25	32	40	50	65	80	100	125	150	200	250
Rated flow coefficient		4	6.3	8	16	20	32	50	80	125	160	280	320	450
Noise measuring coefficient Z value		0.6	0.6	0.6	0.55	0.55	0.5	0.5	0.45	0.4	0.35	0.3	0.2	0.2
Allowable differential pressure(Mpa)	PN16	1.6								1.5		1.2	1.0
Allowable differential pressure(Mpa)	PN40	2.0								1.5		1.2	1.0

Working principle

After throttling by the plug and seat, the before–valve pressure P1 of the process medium is changed into the after–valve pressure P2. Through the control pipeline, P2 is input to the lower diaphragm chamber of the actuator and acts on the top disc. The acting force produced balances the reacting force of the spring, determining relative positions of the plug and seat and controlling the after–valve pressure. When the after–valve pressure P2 increases, the acting force of P2 that acts on the top disc will increase accordingly. At the time, the acting force on the top disc is higher than the reacting force of the spring to make the plug close towards the seat, until the acting force on the top disc balances the reacting force of the spring. At the time, the flow area between the plug and seat is reduced, the flow resistance becomes higher and P2 is reduced to the set value. Likewise, when the after–valve pressure P2 decreases, the acting direction is reverse to the above. This is the working principle during the control of after–valve pressure.
When it is necessary to change the set value of after–valve pressure P2, please adjust the adjusting nut.

Dimensions and weight of control valve

DN(mm)	15	20	25	32	40	50	65	80	100	125	150	200	250
L(mm)	130	150	160	180	200	230	290	310	350	400	480	600	730
B(mm)	212	212	238	238	240	240	275	275	380	380	326	354	404
Weight(Kg)	6.2	6.7	9.7	13	14	17	29	33	60	70	80	140	220
B1(mm)	--	--	--	--	--	--	--	--	--	--	630	855	1205
Weight (Kg)	--	--	--	--	--	--	--	--	--	--	140	210	300