Compressed air products

Regulators

53

9.2.7

54

A

B

B

A

Optional extras

Principle of operation

Tamper-proof cap

An aluminium tamper-proof cap can be fitted to prevent unauthorised

pressure adjustment

Dimensions (approximate) in mm

Type 21 mounting bracket

A zinc plated mild steel bracket can be attached to the regulator,

using the plastic mounting ring supplied with the regulator.

Please note: An aluminium mounting ring can be supplied, at extra

cost, and must be specified at the time of order placement.

Dimensions (approximate) in millimetres

A

B

C

D

E

44

19

32

12

6

If the regulator is to be panel mounted a hole is required in the panel

48 mm diameter, and the panel thickness must not exceed 8 mm.

Mounting ring

E

D

C

B

A

Pressure gauges

Available in two sizes, with 4 pressure ranges. The face is marked

in both bar and psi. Please state, size and pressure range when

placing an order.

With system pressure on, the regulator poppet valve assembly is

in the closed position when the adjusting knob is turned fully

counter clockwise (no spring load). By turning the adjusting knob

clockwise, the diaphragm / piston moves downward allowing flow

to come in through the orifice created between the poppet

assembly and seat. The control diaphragm / piston offsetting the

load spring senses pressure downstream. Increasing downstream

pressure causes the poppet assembly to move upward until the

load of the spring and diaphragm / piston are balanced. The outlet

pressure has now been reduced. If a valve is opened downstream,

the increased demand for pressure creates a reduced pressure

under the control diaphragm / piston. The poppet assembly moves

downward due to the load of the control spring opening the seat

area and air is allowed to meet the downstream pressure demand.

Thus, the area of the opening meters the downstream flow.

Pressure ranges

0 to

0 to

0 to

0 to

2 bar

7 bar

11 bar

21 bar

0 to 30 psi

0 to 100 psi

0 to 160 psi

0 to 300 psi (50 mm size only)

Dimensions (approximate) in millimetres

Size

A

B

C

Size

A

B

C

40 mm 40

47

R "

50 mm 49

45

R "

C

Pressure gauges for panel mounting

With chromium plated bezel available in two ranges, the face being

marked in bar and psi as follows:-

Pressure ranges

0 to 2 bar

0 to 30 psi

0 to 7 bar

0 to 100 psi

Dimensions (approximate) in millimetres

A

B

C

D

53

56

48

R

D

C

TI-P504-19 CH Issue 2

IR1M and IRN1M Monnier International Compressed Air Regulators

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