Yoshitake SCV-2 is an inline type check valve designed to prevent fluid backflow. It is widely used in steam pipelines or cold and hot water pipelines and is effective in preventing water hammer.

Features

• Compact piping with inline type.
• Can be connected in any direction (horizontal or vertical).

Specifications

Application	Steam, Cold and hot water
Maximum pressure	1.6 MPa
Application temperature	5-220 °C
Minimum valve opening pressure	0.003 MPa
Body Material	Cast Stainless Steel (SCS14A)
Disc Material	Stainless Steel (SUS316)
Connection	JIS Rc screwed

WARNING

A small amount of fluid leaks out of the product. Therefore, it should not be used for applications requiring complete closing.

Dimensions and Weights

Nominal size	d	L	W	B	Weight (kg)
15A	Rc 1/2	57	50	34	0.50
20A	Rc 3/4	57	50	34	0.45
25A	Rc 1	72	69	50	1.1
40A	Rc 1-1/2	88	89	67	2.0
50A	Rc 2	88	89	67	1.5

Materials

No.	Part Name	Material
1	Body	Cast Stainless Steel (SCS14A)
2	Cover	Cast Stainless Steel (SCS14A)
3	Disc	Stainless Steel (SUS316)
4	Retainer A	Stainless Steel (SUS316)
5	Retainer B	Stainless Steel (SUS316)
6	Spring	Stainless Steel (SUS316)
7	Gasket	PTFE
8	Name Plate	Aluminium (A1050P)

Pressure Loss Chart

Installation

WARNING

• Before installing the product in the piping, be sure to remove foreign substances and scale from the piping.
• At installation, check the direction of the product so that the fluid flowing and the arrow marked on the product are in the same direction.
• Connect the product to the piping so that excessive load, torque or vibration cannot be applied to the product. Be sure to connect the product to piping firmly.
• When installing the product to steam piping, do not apply seal agent for ambient temperature to screwed part of pipes (Use seal tape made of fluororesin etc.)

INFO

• Any installation posture (vertical or horizontal) is possible.
• Keeping fluid in the product for a long term fixes sliding parts and leads to malfunction.
• Fluid with adhesiveness makes the parts stuck and leads to malfunction.
• Installation of rapid open close valve at the outlet side of the product may lead to shorten service life of the product.

Maintenance

Troubleshooting

Trouble	Cause	Remedy
Fluid does not flow	1. Contact surface of body and disc is stuck. 2. Installation direction is wrong.	1. Disassemble and clean. 2. Install the product correctly.
Fluid flows back	1. Foreign substance is attached to contact surface of body and disc. 2. Contact surface of body and disc is worn away. 3. Internal parts are broken.	1. Disassemble and clean. 2. Replace with new ones. 3. Replace with new ones.
Outside leakage	Gasket is broken.	Replace the gasket.

Disassembly and Assembly

DANGER

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.

Disassembly:

1. Remove body and cover.
2. Remove retainer B and retainer A in this order.
3. Remove spring and disc in this order.
4. Remove the gasket from cover.
5. Clean the parts with compressed air or detergent.

Assembly:

• At assembly, be sure to replace the gasket with a new one.
• Assemble the parts in the reversed order of disassembly.
• Cover tightening torque: 150 N·m (15A, 20A), 200 N·m (25A), 250 N·m (40A, 50A).