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Thank you for purchasing this Koganei product.
Before using it, be sure to read this manual and make sure you use it correctly.
Keep this manual in a safe place for future reference.

M140802

Ver.1.1

Instruction Manual

Ver.1.1

FRZB Filter Regulator

For all FRZB Filter Regulators

Selection

Look at the Handling Instructions and Precautions, Specifications, Various 

Characteristics, Dimensions, and other technical materials for each product 

to make the correct decision.

Mounting (installation) direction, support, and securing

1.

  

The products cannot be mounted (installed) if a bending moment or twist-

ing moment is applied to the product or piping.

2.

 

 Do not attach piping so that just one side is fixed as shown in the follow-

ing diagram. Support external piping separately.

Design and selection

Mounting (installation) and piping

Applying bending moment or twisting moment may damage 

the product.

 The muffler must be prepared by the user.

 (In case of NPT thread specifications)

Operating the knob and the moment caused by the OUT (second-

ary) side pipes may damage the product's piping connections.

Note

Note

Note

Preventing contamination by foreign matter

1.

  

Remove all foreign matter, such as metal chips, cutting oil, or dirt, from 

inside pipes with compressed air blow (flushing) and thorough washing 

before fitting the pipes.

2.

  

Do not allow foreign matter, such as metal chips, or sealing tape from the 

piping threads, to get into the pipes when installing the pipes and fittings.

Maintenance space requirements

Assure there is sufficient space for maintenance inspections and mainte-

nance work.

See the dimension diagrams for each of the products regarding the mainte-

nance space.

Attaching steel pipes and fittings

If steel pipes and fittings are attached to the threaded sections of the alumi-

num die-cast parts of the product, tighten them to the torque recommended 

in our standards.

If a product is not securely fixed in place, it may fall over, be dropped, 

or operate abnormally and cause an injury.

It there is not enough allowance for maintenance space, it is 

impossible to remove the bowl assembly and replace the filter.

Also, it is impossible to do maintenance inspections so the equipment 

may stop or the product may be damaged.

Tightening with excessive torque may damage the product or injure 

workers or operators.

Use a tightening torque of 3.0 to 5.0 N

m [2.21 to 3.69 ft

lbf] if the 

various pressure gauges are mounted on the 1/8 or 1/4 pressure port 

plate.

Foreign matter entering the piping may damage the product or reduce 

its performance and service life.

3.

  

Use the brackets to install the products.

4.

 

 When mounting (installing) products, always make sure they are 

secured and sufficiently supported.

Recommended tightening torque

Connecting 

thread

M5

1/8

1/4

3/8

1/2

Torque

1 to 1.5

[0.7 to 1.1]

4.5 to 6.5

[3.3 to 4.8]

7 to 9

[5.2 to 6.6]

12.5 to 14.5

[9.2 to 10.7]

20 to 22  

[14.8 to 16.2]

N

m [ft

lbf] 

Note

Note

Note

Note

Note

Note

Note

MPa

0.1
0.2
0.3

0.4

0.8

0.2

0.4

0.6

0

1.0

MPa

SUP

OPEN

MPa

0.1
0.2
0.3

0.4

0.8

0.2

0.4

0.6

0

1.0

MPa

SUP

OPEN

MPa

0.1
0.2
0.3

0.4

0.8

0.2

0.4

0.6

0

1.0

MPa

SUP

OPEN

MPa

0.1
0.2
0.3

0.4

0.8

0.2

0.4

0.6

0

1.0

MPa

SUP

OPEN

MPa

0.1
0.2
0.3

0.4

0.8

0.2

0.4

0.6

0

1.0

MPa

SUP

OPEN

If liquid sealant gets on the polycarbonate parts, it may damage them.

4.  If you are using liquid sealant, do not get it on the polycarbonate parts 

(the bowl of the filter regulator and the front cover of the pressure gauge).

3.  Wrap the sealing tape in the direction as shown in the diagram below 

leaving 1.5 to 2 threads uncovered. When using liquid sealant, apply a 

suitable amount and in the same way leave 1.5 to 2 threads uncovered.

If the sealing tape or sealant gets on the lip of pipes or 

fittings, bits of it may get into the pipes and cause air leaks.

Leave 2 threads open

Leave 2 threads open

Direction of 

wrapping

Sealing tape

Liquid 

sealant

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