The PVSKM full flow cut-off valve is developed to
comply with the new functional safety standards.
PVSKM is a cost-efficient way to implement a
redundant hydraulic architecture for category 2 safety
functions.
Applying PVSKM in a PVG valve will offer two
independent hydraulic cut-off possibilities for flow to
work functions. PVSKM can be placed anywhere in the
PVG valve stack to close the entire valve group or just
a part of it, depending on the position.
One or more PVSKM valves can be placed in the PVG
128/256 valve assemblies to make the system
redundant.
Features
PVSKM Functions
•
P-blocked (neutral), safety function,
blocking flow to downstream PVG
sections.
•
P-PVG (There is connection to P port
(P2) at the same time as P to P (PVG) is
open)
•
P-HPCO, oil flow supply for another
external valve
•
Aux function (optional)
*
HPCO
•
PVSKM module can deliver flow up to
300 L/min.
**
•
PVSKM module can be used with both
closed center and open center valves
connected to the HPCO port.
Additional Features
•
Interface to Standard PVM 256
•
HPCO port (BSP G1“)
•
Aux port for external pilot pressure
(max. 350 Bar) e.g., brake release etc.
•
Aux port includes SDC10-3 cavity
facilitating optional Integrated cartridge
valve.
(PVSKM will be delivered from the factory
with a cavity plug. Cartridge valve will have
to be ordered separately by the customer)
Comprehensive technical literature is
online at www.danfoss.com
Please refer to the PVE256 and PVHC256
reaction time when choosing actuator
*
Release pressure for over center valves / brakes / charge pressure for piston motors / lubrication circuit
**
Please see graph for HPCO and flow above 300 l/min
Data Sheet
Proportional Valve Group
PVSKM 128/256
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Technical Data for PVG 128/256 PVSKM
Max. P-port cont. Max. P-port Int. Max. T pressure
static/dynamic
Max. Rated flow
HPCO
*
Max. Rated flow
with PVP128 OC P-
P2
Max. Aux press. Max Aux Flow
350 bar [5076 psi] 400 bar [5800 psi] 25/40 bar [363/580
psi]
300 l/min*
400 l/min 350 bar 40 l/min
*
Please see graph for HPCO
PVG 128/256 PVSKM
Part Number Threaded port Aux-Facility Aux Port HPCO Port P2 Port
11202464 BSP Yes
**
G½” G 1” G 1-1/4”
**
By default, the optional Aux cavity will be delivered plugged from the Factory
Spools for PVSKM for CC or OC valve systems connected to HPCO port
Part Number PVE CC OC
11225407 Yes x
11225408 Yes x
Schematics for PVSKM 128/256
Schematics for PVSKM 128/256
Data Sheet
PVSKM 128/256
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Pressure drop P-PVG with variable pump
For rated flow for PVB128/256 ensure margin pressure of 15 bar
after the PVSKM256.
This is done by adding the pressure drop, from the curve at the
required flow, to the pump margin.
Pressure drop PVSKM P2 port
HF PVSKM Pline to HPCO port pressure losses trendline
Data Sheet
PVSKM 128/256
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Schematic for PVG 128/256 valve group with PVSKM and External Open Center PVF connected to HPCO
Data Sheet
PVSKM 128/256
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Schematic for PVG 128/256 valve group with extern Closed Center PVG
Data Sheet
PVSKM 128/256
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Dimensions for PVSKM 128/256
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
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