Pressure Build-Up For Pressure Controlled Spools; Examples Of How To Use The Characteristics For Pressure Control Spools - Danfoss PVG 32 Technical Information

Technical Information
PVG 32 Proportional Valve Group
Technical characteristics
38 | © Danfoss | November 2017

Pressure build-up for pressure controlled spools

Max. oil flow can be reduced by about 50%
without limitation of maximum pressure by
limiting the main spool travel from 7 mm
[0.28 in] to 5.5 mm [0.22 in].

Examples of how to use the characteristics for pressure control spools

Example 1: Determining the oil flow
Given:
•
Spool type B
•
Pressure setting P : 160 bar [2320 psi]
P
•
Load pressure, LS : 100 bar [1450 psi]
A/B
Result:
Oil flow = 75 l/min [19.8 US gal/min]
Normally a smaller spool can be chosen with pressure control. It is our experience that the spool can be
one size smaller than with normal flow control.
Example 2: Determining the spool size
Given:
•
Max. oil flow, Q : 90 l/min [23.8 US gal/min]
A/B
•
Pressure setting P : 150 bar [2175 psi]
P
•
Load pressure, P : 125 bar [1810 psi]
LSA
Result: D spool
(see Pressure CS flow characteristics, size D)
BC00000038en-US0803