Danfoss KDC 065 A 2 multifunctional compressor pressure control valve, 65 mm (2 1/2 in) butt weld ASME B36.10M Schedule 40, angle-way, 2 bar opening differential, 40 bar MWP

Danfoss KDC 065 A 2 multifunctional compressor valve (pressure control valve), code 148G3831. Angle-way valve with butt-weld connections to ASME B36.10M Schedule 40, nominal size 65 mm (2 1/2 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 2 bar (29 psi) above the suction pressure, at which point the spring is compressed and the cone lifts. This 2 bar spring setting suits high-pressure compressors. 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 78 m³/h (Cv 90 gal/min) fully open. Suitable for hydrocarbon (HC) refrigerants. PED category II. CE marked; EAC (EAEU) certified.

Type

Danfoss KDC 065 A 2 multifunctional compressor valve (pressure control valve)

Code number

148G3831

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

65 mm (2 1/2 in)

Opening (set) differential pressure

2 bar (29 psi)

Maximum working pressure

40 bar (580 psig)

Media temperature range

-50 °C to 150 °C (-58 °F to 302 °F)

Kv fully open

78 m³/h

Cv fully open

90 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; EAC (EAEU) certified

Net weight

4.528 Kilogram

Gross weight

5.821 Kilogram

EAN

5702428883825

Standard

ASME B36.10M Schedule 40

Size / Series

65 mm

Material

Low-temperature steel

Pressure Rating

40 bar

Temperature Range

-50 °C to 150 °C

HS Code

8481.10