Yoshitake SCV-4EN lift check valve prevents backflow of fluid. It is widely used in steam, air, cold and hot water, oil, and other non-hazardous fluid pipelines. The valve and the valve seat are made of stainless steel for excellent durability.

WARNING

• The product cannot be disassembled.
• Do not use the valve in applications that do not allow any valve seat leakage (since a small amount of fluid leaks out of the product).
• The valve can be installed on a vertical pipe only for the flow from bottom to top.

Specifications

Model	SCV-4EN
Nominal size	15-250A
Application	Steam, Air, Cold and hot water, Oil, non-hazardous fluid
Maximum pressure	1.6 MPa
Maximum temperature	300°C
Connection	BS PN16 / EN PN16 flanged
Minimum valve opening pressure	0.05 MPa
Installation posture	Horizontal and Vertical
Body	Cast Iron (EN-GJL-250 JL1040)
Disc / Valve, valve seat	Stainless steel (X20Cr13 1.4021)

Working Pressure and Temperature Rating

Temperature (°C)	-10 to 120	150	180	200	250	300
Maximum working pressure	1.6 MPa	1.4 MPa	1.3 MPa	1.2 MPa	1.1 MPa	0.9 MPa

Dimensions and Weights

Nominal size	d	H	L	D	C	G	n-h	Weight (kg)
15A	15	56	130	95	65	46	4-14	2.1
20A	20	56	150	105	75	56	4-14	2.7
25A	25	67	160	115	85	65	4-14	3.8
32A	32	76	180	140	100	76	4-19	5.5
40A	40	89	200	150	110	84	4-19	7.4
50A	50	96	230	165	125	99	4-19	9.5
65A	65	104	290	185	145	118	4-19	15.0
80A	80	124	310	200	160	132	8-19	20.0
100A	100	161	350	220	180	156	8-19	29.0
125A	125	174	400	250	210	184	8-19	41.0
150A	150	197	480	285	240	211	8-23	66.0
200A	200	248	600	340	295	266	12-23	111
250A	250	295	730	405	355	319	12-28	196

Parts List

No.	Part name	Material
1	Body	Cast Iron
2	Valve seat	Stainless Steel
3	Bonnet	Cast Iron
4	Stem	Stainless Steel
5	Spring	Stainless Steel
6	Valve	Stainless Steel
7	Hexagon bolt	Steel
8	Gasket	Graphite+CrNi

Pressure Loss

The values listed on the chart below are reference values. It varies depend on the piping conditions and usage environment. Use a safety factor more than 20% for product selection.

Installation and Operation Precautions

Installation

• Check the direction of the product so that the fluid flowing and the arrow marked on the product are in the same direction.
• Secure enough space needed for maintenance, inspection and repair of the product.
• Before installing the product, be sure to remove foreign substances and scale from the piping, and prevent seal materials to be used for piping connection from flowing into the inside of piping.
• Do not make dissimilar metal piping which causes difference of electrical potential.

Operation

• Before flowing the fluid, make sure that there is no danger when the fluid flows to the end of piping.
• Keep the product warm and drainage the water to prevent from freezing.
• In case of high temperature fluid, please do not touch the product directly with hands.

Troubleshooting

Trouble	Cause	Remedy
Fluid does not flow.	1. Contact surface of valve and valve seat is stuck. 2. Installation direction is wrong.	1. Replace the product if valve does not move. 2. Confirm the arrow on the product and install it correctly.
Fluid flows back.	1. Contact surface of valve and valve seat is worn away. 2. Internal parts are damaged.	1. Replace the product. 2. Replace the product.

Maintenance Warning

Completely discharge the pressure inside of the product, line and equipment before disassembling or maintenance. In the case of high-temperature fluid, cool down the product till it can be touched with bare hands. Failure to follow this notice may result in injury or burns.