Danfoss Pressure Reducing Valves User guide

Pressure Reducing Valves Technical Information

Quick Reference

Pressure Reducing, Non-Relieving			Model No.	Cavity	Description	Flow*	Pressure	Page
			CP230-2	SDC10-3	Pressure Reducing,	40 l/min	210 bar	PR - 4
2		1			Non-Relieving,	[11 US gal/min]	[3000 psi]
			PRC 06	NCS06/3	Direct Acting	40 l/min	315 bar	PR - 5
						[11 US gal/min]	[4500 psi]

3
Pressure Reducing, Relieving	Model No.	Cavity	Description	Flow*	Pressure	Page
	CP230-1	SDC10-3	Pressure Reducing,	40 l/min	210 bar	PR - 6
2	1		Relieving, Direct Acting	[11 US gal/min]	[3000 psi]
3

Pressure Reducing, Relieving	Model No.	Cavity	Description	Flow*	Pressure	Page
	PRR10-PVG	SDC10-3	Pressure Reducing,	40 l/min	210 bar	PR - 7
			Relieving,	[11 US gal/min]	[3000 psi]
			Direct Acting,
			Designed for PVG
			Actuators

Pressure Reducing, Non-Relieving	Model No.	Cavity	Description	Flow*	Pressure	Page
	CP230-4	SDC10-3	Pressure Reducing,	40 l/min	350 bar	PR - 8
			Non-Relieving,	[11 US gal/min]	[5000 psi]
	PPRC 06	NCS06/3	Pilot Operated	40 l/min	315 bar	PR - 9
				[11 US gal/min]	[4500 psi]

Pressure Reducing, Relieving	Model No.	Cavity	Description	Flow*	Pressure	Page
	PRMP 064	SDC10-3	Pressure Reducing,	40 l/min	315 bar	PR - 10
			Relieving,	[11 US gal/min]	[4500 psi]
	CP231-3	CP12-3S	Pilot Operated	115 l/min	350 bar	PR - 11
				[30 US gal/min]	[5000 psi]

Pressure Reducing, Relieving		Model No.	Cavity	Description	Flow*	Pressure	Page
		PRR10-DRD	SDC10-4	Pressure Reducing,	38 l/min	207 bar	PR - 12
4				Relieving,	[10 US gal/min]	[3000 psi]
2	3			Direct Acting with
				Damping Port
	1

* Flow ratings are based on a pressure drop of 7 bar [100 psi] unless otherwise noted. They are for comparison purposes only.

BC332375439105en-000101 • February 2020

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Pressure Reducing Valves Technical Information

Application Notes

PRESSURE REDUCING Pressure reducing valves are pressure limiting devices that limit pressure in one portion VALVES of a circuit while leaving system pressure unaffected. They are available in direct-acting

and pilot-operated types and as pressure reducing/relieving valves or as pressure reducing valves only.

Pressure reducing valves

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<![endif]>Applications Notes

DIRECT ACTING	Direct-acting pressure reducing/relieving valves allow flow to pass from 2 to 1 until
PRESSURE REDUCING /	the pressure at 1 reaches the predetermined setting, at which point the spool shifts to
RELIEVING VALVES	restrict input flow from 2 (reducing mode) or to open flow from 1 to 3 (relieving mode)
	as needed to maintain the regulated pressure at 1.
	Advantages of direct-acting pressure		Direct acting pressure reducing valve
	reducing valves are:
	·	Fast response	1
	·	Economical	2 3

A typical application for direct-acting pressure reducing valves is for pressure control in systems requiring two or more different pressure settings. These valves are best suited for low flow applications such as hydraulic brake or motor shift.

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Pressure Reducing Valves Technical Information

Application Notes

PILOT-OPERATED	Pilot-operated pressure reducing/relieving valves operate similarly to direct-acting
PRESSURE REDUCING /	pressure reducing/relieving valves -- the spool allows flow to pass from 2 to 1 until the
RELIEVING VALVES	pressure at 1 reaches the predetermined setting and forces the pilot poppet off it’s
	seat. This creates a pressure differential across the spool that causes the spool to shift
	and maintain regulated pressure at 1 in the same manner as the direct-acting pressure
	reducing/relieving valve.

Advantages of pilot-operated relief valves are:

·Smooth, stable response

·High pressure capability

·Precise pressure control with varying flow rates

Pilot-operated pressure reducing valve

1

2 3

A typical application for pilot-operated pressure reducing valves is for pressure control in systems requiring two or more different pressure settings where high pressure capability and/or extremely precise pressure control is required.

BC332375439105en-000101 • February 2020

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Pressure Reducing Valves Technical Information

Pressure Reducing, Non-Relieving, Direct Acting

CP230-2

OPERATION	This is a direct-acting pressure-reducing
	(non-relieving) valve.

SPECIFICATIONS	Theoretical performance
	psi			bar	154 SUS (33 cSt) hyd. oil @ 100° F (38° C)
	1,740			120
	1,450			100
	1,160			80
	870	<![if ! IE]> <![endif]>Pressure		60
	580			40
	290			20
				0
					L/min	10		20			30		40		50
										Flow
				US gal/min		2.6		5.3			7.9		10.6		13.2
DIMENSIONS	Cross-sectional view
mm [in]

Schematic

2			1
3
Specifications
Rated pressure		210 bar [3000 psi]
Rated flow at 7 bar		40 l/min
[100 psi]		[11 US gal/min]
Weight		0.25 kg [0.56 lb]
Cavity		SDC10-3

			h 1.00 in
			t 41-47 N.m
		7/8-14 UNF THD	[30-35 lbf.ft]
			Type A	Type E
1			adjustment	adjustment
Regulated			Type F
2	3		adjustment	Type K
Press46.4 Tank
		55.9	80.0	adjustment
	[1.83]	[2.20]		max.
			[3.15]

ORDERING
INFORMATION	CP230 - 2 - B - 6S - A - C - 100

Seals

Seal kit

B

=

Buna-N

120027

V

=

Viton

120028

Housing and ports

Housing P/N

0

=

No Housing

No Housing

SE3B

=

Al, 3/8 BSP

SDC10-3-SE-3B

SE4B

=

Al, 1/2 BSP

SDC10-3-SE-4B

6S

=

Al, #6 SAE

CP10-3-6S

8S

=

Al, #8 SAE

CP10-3-8S

Other housings available

Adjustment option

A

=

Internal

E

=

External

F

=

Tamper resistant

K

=

Knob

Crack pressure

Code x 10 = psi

Example: 100 = 1000 psi

Pressure range
		bar	[psi]
A	=	4-28	[50-400]
Std. setting		17	[250]
B	=	5-55	[75-800]
Std. setting		28	[400]
C	=	7-97	[100-1400]
Std. setting		69	[1000]
D	=	34-166	[500-2400]
Std. setting		103	[1500]

BC332375439105en-000101 • February 2020

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