الوصف

 
Summary
TheV230D01/V231D01self-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.
Body

DN		15、20、25、32、40、50、65、80、100、125、150、200、250mm
PN		Class150、300
Flange standard		ANSI、JIS、DIN GB JB(special standards can be offered according to user requirements)
Body material		WCB、CF8、CF3、CF8M、CF3M
Plug material	Hard seal	Stainless steel (304、316、316L)
	Soft seal	Stainless steel embedded with rubber ring
Pressure balancing		Stainless steel bellows (DN15~125), balanced diaphragm (DN150~250)

Actuator

Effective area (cm2)	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 the pressure valve	≥0.05	≥0.04	≥0.01	≥0.005
Allowable maximum differential pressure between the upper a nd 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 Φ10X 1(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)Â	Hard seal	4×0.01% valve rated capacity
	Soft seal	DN15~50	DN65-DN125	DN150~250
		10 bubbles/ min	20 bubbles/min	40 bubbles/min

Structural figure

1Body	2Seat	3 Valve shaft	4 Bonnet	5 Diaphragm	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℃                          Â	≤140℃
		Cooling tank≤200℃	Cooling tank and extension ≤200℃
		Cooling tan k and heat sink ≤350℃※           Â	Cooling tank and extension ≤300℃※
	Soft seal	≤150℃

Note:  ※It indicates the allowable working temperature is valid only when the medium is steam and the  Body with PN40 shall be adopted when the temperature resistance is 350℃.
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	PN16	1.6								1.5		1.2	1
pressure (Mpa)	PN40	2

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 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 actson the top disc w ill 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.  

I. 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

بلد:	China
نموذج رقم:	-
سعر فوب:	50 ~ 150 / Piece (قابل للتفاوض) أحصل على آخر سعر
الموقع:	-
سعر الحد الأدنى للطلب:	50 per Piece
الحد الأدني للطلب:	1 Piece
تفاصيل التغليف:	WOODEN
موعد التسليم:	15
القدرة على التوريد:	-
نوع الدفع:	T/T, L/C, D/A, D/P
مجموعة المنتج :	self-operated control valve