Swing Check Valve

Design & Manufacture Standard

GB/T 12235 API 6D

Face-to-face Dimension Standard

GB/T 12221 ASME B16.10

Flange Standard

JB/T 79.1 ASME B16.5 HG/T 20592

Inspection and Test Standard

GB/T 13927 API 598

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Features and benefits Technical details Download

The Youfumi Swing Check Valve is designed to allow flow in one direction and automatically prevent backflow, ensuring system safety and efficiency.

Featuring a hinged disc that swings open with forward flow and closes with reverse pressure and gravity, it offers reliable, maintenance-free operation.

Made from high-quality stainless steel, it provides excellent corrosion resistance, low pressure drop, and long service life. Ideal for water, steam, oil, and chemical applications in various industrial systems.

ASME Class 150 Dimensions

ASME Class 150 Dimensions (Unit: mm)
NPS	L	D	D1	D2	b	f	Z-d	H
2	203	152	120.6	92	19	2	4-19	161
2½	216	178	139.7	105	22	2	4-19	180
3	241	190	152.4	127	24	2	4-19	190
4	292	229	190.5	157	24	2	8-19	203
5	330	254	215.9	186	24	2	8-22	229
6	356	279	241.3	216	25	2	8-22	257
8	495	343	298.4	270	29	2	8-22	292
10	622	406	362	324	30	2	12-25	355
12	698	483	431.8	381	32	2	12-25	396
14	787	533	476.2	413	35	2	12-29	445

ASME Class 300 Dimensions

ASME Class 300 Dimensions (Unit: mm)
NPS	L	D	D1	D2	b	f	Z-d	H
2	267	165	127	92	22	2	8-19	179.5
2½	292	190	149.4	105	25	2	8-22	190
3	318	210	168.1	127	29	2	8-22	212.4
4	356	254	200.2	157	32	2	8-22	246
5	400	279	235	186	35	2	12-22	257
6	444	318	269.7	216	37	2	12-25	292
8	533	381	330.2	270	41	2	16-29	328
10	622	444	387.4	324	48	2	16-32	378.6
12	711	521	450.6	381	51	2	20-32	420
14	838	584	514.4	413	54	2	20-35	530

Test Pressure Table

Test Pressure	Nominal Pressure
Test Pressure	1.6 MPa	2.5 MPa	4.0 MPa
Shell Test	2.4 MPa	3.75 MPa	6.0 MPa
Sealing Test (liquid)	1.76 MPa	2.75 MPa	4.4 MPa
Sealing Test (air)	0.5 MPa ~ 0.7 MPa
Applicable Medium	Water, Steam, Oil	Nitric Acid	Oil
Applicable Temperature	≤425°C	≤425°C	≤425°C