Danfoss KDC 125 A 0.5 multifunctional compressor pressure control valve, 125 mm (5 in) butt weld ASME B36.10M Schedule 40, angle-way, 0.5 bar opening differential, 40 bar MWP

Danfoss KDC 125 A 0.5 multifunctional compressor valve (pressure control valve), code 148G3828. Angle-way valve with butt-weld connections to ASME B36.10M Schedule 40, nominal size 125 mm (5 in), for industrial refrigeration compressor packages. The KDC controls the compressor discharge pressure to ensure a fast build-up of pressure and lubrication (oil) pressure at start-up, and simultaneously acts as a check valve in the compressor discharge line to prevent reverse flow when the compressor stops. The valve is force-controlled: it opens when the pressure downstream (oil separator / discharge side) rises to 0.5 bar (7.5 psi) above the suction pressure, at which point the spring is compressed and the cone lifts. This 0.5 bar spring setting suits low-pressure (booster) compressors, which require only a small differential to open. Housing and bonnet are low-temperature steel with stainless-steel bolts; the valve is mounted vertically with the cone downward and carries a threaded NPT 1/4 in pilot-line connection on the bonnet. Maximum working pressure 40 bar (580 psig); media temperature range -50 °C to 150 °C (-58 °F to 302 °F). Flow coefficient Kv 333 m³/h (Cv 386 gal/min) fully open. Suitable for hydrocarbon (HC) refrigerants. PED category II. CE marked.

Type

Danfoss KDC 125 A 0.5 multifunctional compressor valve (pressure control valve)

Code number

148G3828

Series

KDC / GVD (mechanical pressure regulating valves)

Function

discharge-pressure control + discharge-line check valve (fast oil/lubrication pressure build-up at compressor start)

Direction

Angle-way

Connection type

Butt weld

Connection standard

ASME B36.10M Schedule 40

Nominal size

125 mm (5 in)

Opening (set) differential pressure

0.5 bar (7.5 psi)

Maximum working pressure

40 bar (580 psig)

Media temperature range

-50 °C to 150 °C (-58 °F to 302 °F)

Kv fully open

333 m³/h

Cv fully open

386 gal/min

Body / bonnet material

low-temperature steel; stainless-steel bolts

Pilot connection

NPT 1/4 in (on bonnet)

Mounting

vertical, cone downward

Refrigerants

R1270, R170, R290, R600, R600a, RE170

PED category

II

Approvals

CE marked

Net weight

28.713 Kilogram

Gross weight

36 Kilogram

EAN

5702428883474

Standard

ASME B36.10M Schedule 40

Size / Series

125 mm

Material

Low-temperature steel

Pressure Rating

40 bar

Temperature Range

-50 °C to 150 °C

HS Code

8481.10