The 30D12Y、30D12R pilot-operated (after valve)pressure control valve

The company has obtained certifications such as TS equipment A1 level, CE, API 607, TR-CU, SIL3, etc.

Classification：

30 series self operated control valve

E-mail: sunny@reowocv.com

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Product Description

Summary
The 30D12Y/30D12R pilot–operated (after valve) pressure control valve is composed of the control valve，pilot and actuator.
It is suitable for controlling differential pressure in the pipes of non–crrosive liquids,gases and steams.when the differential 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.High control precision

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	250
Pressure setting range	0.01~0.12 0.08~0.25 0.2~0.5 0.45~1 0.6~2.0
Minimum differential pressure that ensures normal work of thepressure valve	0.08 for DN15~125, 0.1 for DN150~250
Allowable maximum differential pressure between the upper and lower diaphragm chambers	0.4
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	±4%
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

The 30D12Y、30D12R pilot-operated (after valve)pressure control valve

Structural figure

1	Body	2	Seat	3	Stem	4	Before-valve pressure P1 pipe
5	Balanced bellows	6	Travel indicator	7	Diaphragm	8	Spring
9	Operating pressure Ps pipe	10	After-valve pressure P2 pipe	11	Pilot	12	Pilot plug
13	Spring	14	Bellows	15	Adjusting screw	16	Adjustable needle 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

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

The service medium passes through the pressure control valve along the direction indicated by the arrow, and transfers the before-valve pressure P1 to the pilot through the pressure pipe (4). Through adjustment by the adjusting screw (15) at the setting point, the corresponding operating Ps is generated in the pilot. The operating force Ps acts on the upper diaphragm chamber of the actuator, the set pressure (after-valve pressure) P2 acts on the lower diaphragm chamber and is connected with the feedback signal port of the pilot. When the set pressure P2 rises, the compression of the spring (13) in the pilot increases to make the pilot plug (12) move towards the closing direction (downwards) and Ps decreases. Thus, P2 in the lower diaphragm chamber of the actuator increases and Ps in the upper diaphragm chamber decreases to make the plug of the control valve move towards the closing direction, so as to reduce P2 until it returns to the set value.
When P2 decreases, the acting direction is reverse to the above.
When setting the after-valve (or before-valve) pressure at the site, please set the pressure through the adjusting screw (15) and needle valve (16).

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