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Check Valves（Control Side, Plumbing Thread Nominal：1/8B）

Check valves for fluids are a type of valves which allow fluids to flow in one direction, but automatically close when the flow reverses. They are also called non-return valves or one-way valves. They can prevent the backflow securely and open with small differential pressure. They are applied to piping systems where the backflow prevention is required, frequent open/close are expected, some restrictions exist around the pipings, etc. To install, there are screw-in connection type to screw in the check valve, and flangeless type that clamps the entire check valve with pipes. Furthermore, they are divided into small diameter valves or large diameter valves. Materials of the main body are copper alloy, stainless steel, fluoropolymer, plastic, etc. Sealing materials vary depending on the application; metal is used for places where the temperature becomes high due to steam, etc., and rubber is for places under low temperatures such as hot or cold water.

Configure

Specification/Dimensions

Applicable Fluid
- Water
- Air
- Oil
- Gas
- Chemical
- Others
Clear

Type
- Swing Type
- Lift Type
- Spring Type (In-line)
- Wafer Type
- Others
Clear

Material
Brass

Bronze

Cast Iron

Cast Steel

Ductile Cast Iron

Lead-free Copper Alloy

Resin

Stainless Steel

Stainless Steel Cast

Steel
Clear

Max. Operating Pressure(MPa)
0.5

0.6

0.98

1

1.18

1.2

1.37

1.4

1.6

1.73

2

2.1

2.2

2.75

2.8

3.4

4.9

5.1

21.0

34.5

70
Clear

Nominal Pressure
10K

16K

20K

125

150

200

300

No Standard, Others
Clear

Supply Side, Connection Type
Flange

Rc (R)
Clear

Supply Side, Plumbing Thread Nominal
1B

1 1/2B

1 1/4B

1/2B

1/4B

1/8B

2B

2 1/2B

3B

3/4B

3/8B

4B
Clear

Control Side, Connection Type
Flange

Rc (R)
Clear

Control Side, Plumbing Thread Nominal
1B

1 1/2B

1 1/4B

1/2B

1/4B

1/8B

2B

2 1/2B

3B

3/4B

3/8B

4B
Clear

Supply Side, Tube Flange Nominal
1B

1 1/2B

1 1/4B

1/2B

2B

2 1/2B

3B

3/4B

4B

5B

6B

8B

10B

12B
Clear

Control Side, Tube Flange Nominal
1B

1 1/2B

1 1/4B

1/2B

2B

2 1/2B

3B

3/4B

4B

5B

6B

8B

10B

12B
Clear

Cracking Pressure(MPa)
0.007

0.04

0.05

0.3
Clear

Brand	(0) (0) ASOH (2) DANFOSS (0) ESCO (1) HITACHIVALVE (0) ISHIZAKI CO (0) KITZ (0) KOYO (1) MIYAWAKI (0) ONDASEISAKUSYO (0) RS Pro (0) SEKISUI CHEMICAL (0) SNL FITTING (0) TOMOEVALVE (0) TOYO VALVE (0) VENN (0) YOSHITAKE (0)
CAD	2D 3D
Days to Ship	All Same day 3 Day(s) or Less 4 Day(s) or Less 5 Day(s) or Less 6 Day(s) or Less Others

4 items

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: 30; 60; 90

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A-Check Nipple Type

ASOH

The check valve body is a dual external-thread type.
[Features]
· For helping save space when piping.
· The simple poppet structure ensures no leaks from back pressure.

From: ฿ 600.81
Days to Ship: 3 Day(s)

3 Day(s)

Compare

Until 31/03/2026

Check Fitting CSB

KOYO

Made using cadmium-free brass material.

[Features]
· A fitting in which a fitting and check valve are integrated.
· A useful fitting for saving space and cost.
· The spring poppet check valve provides flow direction to the piping system

From: ฿ 494.68
Special Price
Days to Ship: 3 Day(s)

3 Day(s)

Compare

A-Check Socket Type

ASOH

The check valve main body is a dual-thread type.
[Features]
· For helping space-saving when piping.
· The simple poppet structure ensures no leaks from back pressure.

From: ฿ 801.35
Days to Ship: 3 Day(s)

3 Day(s)

Compare

Check Valve (Brass)

ESCO

Machine tools, cleaning machines, various hydraulic equipment, analyzers, boilers, burners, construction machinery, drip prevention, gas mixers, fluid control systems.

From: ฿ 1,118.02
Days to Ship: 3 Day(s)

3 Day(s)


Brand
Product Series
From
Days to Ship
Applicable Fluid
Type
Material
Max. Operating Pressure(MPa)
Nominal Pressure
Supply Side, Connection Type
Supply Side, Plumbing Thread Nominal
Control Side, Connection Type
Control Side, Plumbing Thread Nominal
Supply Side, Tube Flange Nominal
Control Side, Tube Flange Nominal
Cracking Pressure(MPa)

	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare Until 31/03/2026	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare
Brand	ASOH	KOYO	ASOH	ESCO
Product Series	A-Check Nipple Type	Check Fitting CSB	A-Check Socket Type	Check Valve (Brass)
From	฿ 600.81	฿ 494.68 Special Price On Sale Until 31/03/2026	฿ 801.35	฿ 1,118.02
Days to Ship	3 Day(s)	3 Day(s)	3 Day(s)	3 Day(s)
Applicable Fluid	Water / Air	Air	Water / Air	Oil / Gas
Type	Spring Type (In-line)	Spring Type (In-line)	Spring Type (In-line)	-
Material	Brass ～ Stainless Steel	Brass	Brass ～ Stainless Steel	Brass
Max. Operating Pressure(MPa)	2	21	2	4.9
Nominal Pressure	No Standard, Others	No Standard, Others	No Standard, Others	-
Supply Side, Connection Type	Rc (R)	Rc (R)	Rc (R)	Rc (R)
Supply Side, Plumbing Thread Nominal	1/8B	1/8B	1/8B	1/8B
Control Side, Connection Type	Rc (R)	Rc (R)	Rc (R)	Rc (R)
Control Side, Plumbing Thread Nominal	1/8B	1/8B	1/8B	1/8B
Supply Side, Tube Flange Nominal	-	-	-	-
Control Side, Tube Flange Nominal	-	-	-	-
Cracking Pressure(MPa)	0.007	0.05	0.007	0.007