Kaifeng Ruifa & Medium Pressure Valve Co., Ltd.

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We manufacture more than a thousand specifications of over ten series of products, including safety valves, power station valves, steam extraction check valves, gate valves, globe valves, check valves, hard-sealed ball valves, all-welded ball valves, ball valves, butterfly valves, and other models and specifications.

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ZFA42

Pound-class spring-loaded safety valve

Safety valves are used on pressure vessels such as boilers and pressure containers as overpressure protection devices. When the pressure of the medium inside the protected equipment rises abnormally and exceeds the specified value, the valve automatically opens and then fully opens to prevent the pressure from continuing to rise; when the pressure drops to the specified value, the valve automatically closes to ensure the normal operation of the equipment. With the arrival of the replacement cycle for imported equipment safety valves in China and China's accession to the WTO, based on ISO4126 "General Requirements for Safety Valves", API526 "Steel Flanged Safety Relief Valves", ASME/ANSIB16.5a "Pipe Flanges and Flanged Fittings", and other standards, and drawing on the experience of domestic and foreign manufacturers of similar products, this factory has compiled this catalog based on the data from the past 10 years of production of American standard safety valves for users and agents to refer to when selecting products.

Product Classification:

Safety valve

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ruifa1988@vip.sina.com

Main Technical Parameters of Safety Valve

Throat Diameter D Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	D=10 71mm²	Inlet	Outlet	L	L1	≈H
ZFA42	1 D2	150	150	115	105	320
	1 D2	300	150	115	105	320
	1 D2	600	150	115	105	330
	1½ D2	900	300	140	105	370
	1½ D2	1500	300	140	105	430
	1½ D3	2500	300	178	140	480

Throat Diameter E Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	E=13 126mm²	Inlet	Outlet	L	L1	≈H
ZFA42	1 E2	150	150	115	105	320
	1 E2	300	150	115	105	320
	1 E2	600	150	115	105	330
	1½ E2	900	300	140	105	370
	1½ E2	1500	300	140	105	430
	1½ E3	2500	300	178	140	480

Throat Diameter F Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	F=16 198mm²	Inlet	Outlet	L	L1	≈H
ZFA42	1½ F2	150	150	121	124	330
	1½ F2	300	150	121	124	330
	1½ F2	600	150	152.5	124	350
	1½ F3	900	300	165	124	390
	1½ F3	1500	300	165	124	450
	1½ F3	2500	300	178	1310	500

Throat Diameter G Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	G=20 324mm²	Inlet	Outlet	L	L1	≈H
ZFA42	1½ G3	150	150	121	124	340
	1½ G3	300	150	121	124	340
	1½ G3	600	300	152.5	124	350
	1½ G3	900	300	165	124	390
	2 G3	1500	300	171.5	156	460
	2 G3	2500	300	171.5	156	500

Throat Diameter H Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	H=26 506mm²	Inlet	Outlet	L	L1	≈H
ZFA42	1½ H3	150	150	124	130	350
	1½ H3	300	150	124	130	350
	2 H3	600	150	162	154	350
	2 H3	900	150	162	154	400
	2 H3	1500	150	162	154	480
	2 H3	2500	300	162	154	530

Throat Diameter J Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	J=33 830mm²	Inlet	Outlet	L	L1	≈H
ZFA42	2 J3	150	150	124	136	350
	2 J3	300	150	124	136	350
	3 J4	600	150	181	184	600
	3 J4	900	150	181	184	620
	3 J4	1500	300	181	184	650

Throat Diameter K Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	K=40 1186mm²	Inlet	Outlet	L	L1	≈H
ZFA42	3 K4	150	150	162	156	390
	3 K4	300	150	162	156	400
	3 K4	600	150	181	184	600
	3 K6	900	150	216	198	620
	3 K6	1500	300	216	197	650

Throat Diameter L Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	L=50 1841mm²	Inlet	Outlet	L	L1	≈H
ZFA42	3 L4	150	150	165	156	400
	3 L4	300	150	165	156	430
	4 L6	600	150	203	180	600
	4 L6	900	150	222	197	620
	4 L6	1500	150	222	197	650

Throat Diameter M Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	M=55 2323mm²	Inlet	Outlet	L	L1	≈H
ZFA42	4 M6	150	150	184	178	530
	4 M6	300	150	184	178	530
	4 M6	600	150	203	178	600
	4 M6	900	150	222	197	680

Throat Diameter N Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	N=60 2323mm²	Inlet	Outlet	L	L1	≈H
ZFA42	4 N6	150	150	210	197	530
	4 N6	300	150	210	197	530
	4 N6	600	150	222	197	600
	4 N6	900	150	222	197	680

Throat Diameter P Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	P=72 4116mm²	Inlet	Outlet	L	L1	≈H
ZFA42	4 P6	150	150	229	181	580
	4 P6	300	150	229	181	580
	4 P6	600	150	254	225	630
	4 P6	900	150	254	225	700

Throat Diameter Q Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	Q=96 7129mm²	Inlet	Outlet	L	L1	≈H
ZFA42	6 Q8	150	150	241	240	780
	6 Q8	300	150	241	240	780
	6 Q8	600	150	241	240	820

Throat Diameter R Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	R=115 10323mm²	Inlet	Outlet	L	L1	≈H
ZFA42	6 R8	150	150	241	240	780
	6 R8	300	150	241	240	780
	6 R8	600	150	241	240	820

Throat Diameter T Specification Size

Model	Specification	Flange Rating (Lb)		Overall Dimensions (mm)
Model	T=148 17195mm²	Inlet	Outlet	L	L1	≈H
ZFA42	8 T10	150	150	279	276	850
	8 T10	300	150	279	276	880
	8 T10	600	150	279	276	930

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Recommend Products

At present, it can produce more than a dozen series of more than 1,000 specifications of safety valves, power station valves, extraction check valves, gate valves, ball valves, check valves, butterfly valves, drain valves, balance valves, and regulating valves of different types and specifications.

Double spring safety valve

A37H/38Y/43H-16C

This valve is suitable for equipment or pipelines with steam, water, and other media operating at temperatures ≤350℃, serving as a pressure relief device. The connection flange conforms to the JB/T 79 standard.

Spring-loaded safety valve

A42Y-160/320;A42Y-160P/320P

The A42Y-C type is suitable for equipment or pipelines with air, petroleum gas, and other media where the operating temperature is ≤300℃.
The A42Y-P/R type is suitable for equipment or pipelines with corrosive gaseous media where the operating temperature is ≤200℃, serving as a pressure relief device.
Connecting flanges conform to JB/T 79 standard.

Flanged Gate Valve

PN2.5-4.0MPa

A straight-through stop valve is a common shut-off valve with characteristics such as a valve seat surface that is not easily worn or scratched; good sealing, long life; good process performance and a wide applicable pressure and temperature range. The closing member moves along the center line of the valve seat, and the change in the valve seat passage is directly proportional to the stroke of the valve disc, with a small valve disc stroke and short opening and closing time. The valve has a small height, making it easy to install and operate in engineering and use. It is generally not used to regulate flow. Main drive methods include: manual, electric, pneumatic, and hydraulic.

Diaphragm balanced safety valve

WA42Y-16C/25/40 WA42Y-16P/25P/40P

This valve is suitable for equipment or pipelines with operating temperatures ≤200℃, unstable back pressure, or toxic and corrosive media, or occasions with high back pressure, acting as a pressure relief device.
Connecting flanges are in accordance with JB/T79 standard.

86-0371-27346028

ruifa1988@vip.sina.com

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