Danfoss S42 P Installation guide

Brand: Danfoss

Model: S42 P

Type: Installation guide

Danfoss S42 P is a remarkable hydraulic pump equipped with an integral loop flushing valve that expedites the removal of heat and contaminants from the system power loop. This system efficiently eliminates unwanted heat and impurities, leading to enhanced system performance and protection of critical components.

Danfoss S42 P is a remarkable hydraulic pump equipped with an integral loop flushing valve that expedites the removal of heat and contaminants from the system power loop. This system efficiently eliminates unwanted heat and impurities, leading to enhanced system performance and protection of critical components.

WARNING

Incorrect charge pressure settings may result in the

inability to build required system pressure and /or

inadequate loop ﬂushing ﬂows. Correct charge pres-

sure must be maintained under all conditions of opera-

tions to maintain pump control performance.

Loop Flushing Shuttle

Valve

System (Loop) Ports

Loop Flushing

Relief Valve

Loop Flushing Assembly

Loop Flushing Flow

Series 42 pumps may incorporate an integral loop ﬂushing

valve for those applications that require additional ﬂuid to be

removed from the system power loop.

The loop ﬂushing valve will remove heat and contaminants

from the main power loop at a rate faster than otherwise

possible. The loop ﬂushing valve poppet includes an oriﬁce

which removes a set volume of ﬂuid from the power loop. This

ﬂuid is in turn made up by the charge pump.

An assessment of the application cooling requirements and

system cooling capacity should be completed prior to instal-

lation of the components in the application. A ﬂushing ﬂow of

5 to 8 L/min (1.5-2 gpm) is generally suitable for most

applications. Please refer to Sauer-Sundstrand BLN-9886

and BLN-10092 or contact your technical support personnel

for further assistance.

This kit contains two relief valves. The valves are marked with

a 2 or a 3. Valve 2 (Options #2) contains a 1.2 mm (0.047 inch)

oriﬁce, while valve 3 (Option #3) contains 1.4 mm (0.055 inch)

oriﬁce. Using the cooling assessment analysis from above

and the graph at the right, a combination of oriﬁce size and

charge pressure relief setting can be used to obtain the desire

cooling ﬂow.

BLN-10121 contains speciﬁc information on the procedure for

installing the relief valve and associated hardware in the

Series 42 pump.

When a Series 42 pump is used with a loop ﬂushing valve

either located in a motor or installed remotely, the setting of

the loop ﬂushing valve should be equal to or less than the

charge pressure setting of the pump.

0

1

2

3

4

5

6

7

8

9

10

0

0.5

1

1.5

2

2.5

0 5 10 15 20 25 30

0 100 200 300 400

Loop Flushing Flow (L/min)

Charge Pressure

(psi)

(gpm)

(bar)

Option 3

Option 2

Relief Valve

© Danfoss, 2013 BLN-10122 • Rev AA • September 2013 1

Service Kit Instructions

Series 42

Loop ﬂushing

1

Danfoss S42 P Installation guide

Brand: Danfoss

Model: S42 P

Type: Installation guide

Danfoss S42 P is a remarkable hydraulic pump equipped with an integral loop flushing valve that expedites the removal of heat and contaminants from the system power loop. This system efficiently eliminates unwanted heat and impurities, leading to enhanced system performance and protection of critical components.

Related papers

Other documents