Honeywell D146 Catalog Page

Differential Pressure Regulators

D146 Differential Pressure Regulators

Used to eliminate excessive pump head pressure when most radiator valves are closed due to reduced demand.

• Install between supply and return sides of a hydronic system to stabilize

pressure differential and reduce the effects of demand changes.

• Control maintains a constant differential between the two sides by

opening a bypass whenever the difference between supply and

return reaches the setpoint.

• Provides silent, trouble-free service.

• Easy installation; requires no electrical hookup.

• Easy adjustment of pressure by turning regulating cap.

• Built-in differential pressure indicator.

• Brass valve body with thermoplastic and stainless steel parts.

•

Diaphragm of EPDM.

D146 Capacities

SIZE: 3/4 IN.

SIZE: 1-1/4 IN.

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20

14 TURNS

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20

12

16

10

21 TURNS

20

15

8

15

18

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6

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14

4

12

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10

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10

10

2

8

MINIMUM

6

(FULL CCW)

4

2

5

5

MINIMUM

0

0

(FULL CCW)

0

5

10

15

0

5

10

15

20

25

30

35

40

45

50

CAPACITY (GPM)

CAPACITY (GPM)

M3180A

Maximum Inlet Pressure Rating (psi): 85 Psi

Temperature Range: 230 F (110 C)

Outlet Pressure Adjustment Range (psi): 0-17 psi

Materials: Brass (body), Stainless steel and engineered thermoplastics.

Pipe Connection: Angle type, female threaded NPT

EPDM diaphragm.

Pipe Size

Dimensions, Approximate

Product Number

inch

DN

Capacity

inch

mm

Description

Includes

D146M1032

3/4 in.

DN20

18 gpm;

6 1/4 in. high x

160 mm high x

Differential Pressure Regulator,

Built-in differential pressure

120,000 Btu/hr

3 3/8 in. wide

86 mm wide

3/4 in.

indicator

D146M1040

1 1/4 in.

DN32

50 gpm;

8 1/2 in. high x

213 mm high x

Differential Pressure Regulator,

Built-in differential pressure

395,000 Btu/hr

4 1/4 in. wide

109 mm wide

1 1/4 in.

indicator

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