Self-pressure (differential pressure) control valve

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Self-pressure (differential pressure) control valve

Model: V231 type
Nominal diameter: DN15 ~ 250mm
Nominal pressure: PN1.6 ~ 4.0 MPa
Temperature: Liquid ≤ 140 ℃, gas ≤ 80 ℃
Main material: cast iron, cast steel, cast stainless steel
design criteria: GB / T17213
Inspection Standard: GB / T4213
Flange Standard: JIS B220, JB / T79, ANSI B16.5-1981, GB / T9113, HG20594-97, HG20618-97, etc.

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Product description:

Direct acting self-acting pressure (differential pressure) control valve, the valve body, seat, valve components and other components, is a kind of without external energy and only rely on the pressure of the media to be adjusted automatically adjust the pressure of energy savings Type products, can be used for non-corrosive (maximum temperature of 350 ℃) liquid, gas and steam and other media pressure control device. Widely used in petroleum, chemical, metallurgy, light industry and other industrial sectors and urban heating, heating systems.

◆ Model, specifications

category	Pressure control valve				Differential pressure control valve
	Valve pressure regulator		Valve pressure regulator		Differential pressure rise valve closed		Pressure differential valve opens
	Hard seal	Soft seal	Hard seal	Soft seal	Hard seal	Soft seal	Hard seal	Soft seal
model	V230 D01	V230D01	V230D02	V231D02	V230D03	V231D03	V230D04	V231D04
specification	DN15-250

Technical Parameters:

Nominal diameter mm		15	20	25	32	40	50	65	80	100	125	150	200	250
Rated flow coefficient Kvs		3.2	5	8	12.5	20	32	50	80	125	160	320	450	630
Nominal pressure MPa		1.6, 4.0
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
The highest working temperature ℃	V230 V231	Liquid ≤ 140, gas ≤ 80
	Hard seal V230	With isolation tank ≤ 200										With isolation tank and extension pieces ≤ 300 *
		With isolation tank and heat sink ≤ 200
Pressure balance element		Corrugated pipe										Rolling the diaphragm
Flange standard		DIA (also available on request flange standard)
Body material		PN16: cast iron (working temperature ≤ 200 ℃); PN4.0: cast steel, cast stainless steel (working temperature ≤ 350 ℃)
Spool material		Stainless steel; soft seal stainless steel inlaid rubber ring
The maximum working pressure MPa		Nominal pressure (Note △ Pmax and the relationship between working pressure and working temperature)

Note:
1, the liquid> 140 ℃, gas> 80 ℃ when the valve flip;
2, Z value: noise measurement coefficient, the value used to measure the size of the noise, the specific calculation see the self-regulating valve selection guide.

◆ Dimension

◆ V230 / V231 control valve size and weight

Nominal diameter mm	20	25	32	40	50	65	80	100	125	150	200	250
L mm	150	160	180	200	230	290	310	350	400	480	600	730
B mm	212	238	238	240	240	275	275	380	380	295	325	372
Approximate weight kg	6.7	9.7	13	14	17	29	33	60	70	80	140	220