DR 20-5-5X/200Y

用于底板安装。
油口布置符合ISO 5781。
用于螺纹连接。
插装阀结构。
四种可选调节方式：

• 旋钮。

• 带六角及保护帽的调节套。

• 带刻度的可锁定旋钮。

• 带刻度旋钮。
五种压力等级。
可选单向阀，仅适用于底板安装型。
防腐蚀结构。

DR 型压力阀为由二次回路控制的先导式减压阀。

减压阀主要由带主阀芯插装件（3）的主阀（1），以及带调节装置的先导阀（2）组成。

静止位置时，阀处于开启状态，液压油由 B 通道经主阀插装件（3）无阻碍地流向 A 通道。A 通道压力作用于主阀芯下侧，同时经喷嘴（4）作用于主阀芯（3）的弹簧加载侧，并经通道（5）作用于先导控制阀（2）中的钢球（6）。该压力还经喷嘴（7）、控制油路（8）、单向阀（9）和喷嘴（10）作用于钢球（6）。根据弹簧（11）的设定，钢球（6）前方、通道（5）及弹簧腔（12）内建立压力，使控制阀芯（13）保持开启。B 通道的液压油可经主阀插装件（3）无阻碍地流向 A 通道，直至 A 通道压力超过弹簧（11）的设定值并使钢球（6）开启，此时控制阀芯（13）向关闭方向移动。

A通道压力与弹簧（11）的设定压力达到平衡时，即达到所需减压值。

弹簧腔（14）的先导油始终经控制管路（15）外部回油至油箱。

可选装单向阀（16），以实现从通道 A 至通道 B 的自由回流。

压力表接口（17）可用于检查通道 A 中降低后的压力。

DR..-4-5X/...Y...型。

01	02	03	04	05		06		07	08	09	10	11	12
DR					–	5X	/		Y				*

01	Pressure reducing valve, pilot-operated			DR
02	Valve complete (subplate mounting or threaded connection)			no code
	Pilot control valve without main spool insert (cartridge valve; do not enter nominal size)			C
	Pilot control valve with main spool insert (cartridge valve)			C30
03	Size	Subplate mounting "–"	Threaded connection "G"
	10	✔	✔ (G1/2)	10
	16	–	✔ (G3/4)	15 1)
	25	✔	✔ (G1)	20
	25	–	✔ (G1 1/4)	25 1)
	32	✔	✔ (G1 1/2)	30
04	As cartridge valve (version "C", without main spool insert)			no code
	As cartridge valve (version "C30", with main spool insert)			–
	For subplate mounting			–
	For threaded connection			G
Adjustment type
05	Rotary knob			4
	Sleeve with hexagon and protective cap ("J3" version without protective cap; always with maximum pressure adjustment)			5
	Lockable rotary knob with scale			6 2)
	Rotary knob with scale			7
06	Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions)			5X
07	Set pressure up to 50 bar			50
	Set pressure up to 100 bar			100
	Set pressure up to 200 bar			200
	Set pressure up to 315 bar			315
	Set pressure up to 350 bar (only version "M")			350
Pilot oil supply
08	Internal pilot oil supply, external pilot oil return			Y
09	With check valve (only for subplate mounting)			no code 1)
09	Without check valve			M
Corrosion resistance
10	None			no code
10	Improved corrosion protection (240 h salt spray test according to EN ISO 9227) (only version "5")			J3
Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data")
11	NBR seals			no code
11	FKM seals			V
12	Further details in the plain text			*

1)	Not for version "J3"
2)	H-Key with material no. R900008158 is included in the scope of delivery.

一般

Size				10	16	25	25	32
Version				"10"	"15"	"20"	"25"	"30"
Weight	Subplate mounting	"DR . .‒"	kg	3.4	-	5.3	-	8
	Cartridge valve	"DRC"	kg	1.2
	Cartridge valve	"DRC30"	kg	1.5
	Threaded connection	"DR . G"	kg	5.3	5.2	5.1	5	4.8
Installation position				any
Ambient temperature range	NBR seals		°C	-30 … +50
Ambient temperature range	FKM seals		°C	-20 … +50

液压

Size			10	16	25		32
Maximum operating pressure 1)	Port B	bar	350
Maximum inlet pressure 1)	Port B	bar	350
Maximum outlet pressure 1)		bar	350
Operating pressure range 1)	Anschluss A	bar	10 … 350
Maximum counter pressure 1)	Port Y	bar	350
Minimum set pressure			flow-dependent, see "characteristic curves"
Maximum set pressure 1)		bar	50 100 200 315 350
Maximum flow	Subplate mounting	l/min	150	-	300	-	400
Maximum flow	Threaded connection	l/min	150	300		400
Hydraulic fluid			see table "Hydraulic fluid"
Hydraulic fluid temperature range	NBR seals	°C	-30 … +80
Hydraulic fluid temperature range	FKM seals	°C	-20 … +80
Viscosity range		mm²/s	10 … 800
Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 2)			Class 20/18/15

1)	350 bar only possible at version "M"
2)	The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter.

(如需在这些数值以外的工况下使用，请咨询我们！)

Hydraulic fluid		Classification	Suitable sealing materials	Standards	Data sheet
Mineral oils		HL, HLP, HLPD, HVLP, HVLPD	NBR, FKM	DIN 51524	90220
Bio-degradable	Insoluble in water	HETG	NBR, FKM	ISO 15380	90221
	Insoluble in water	HEES	FKM	ISO 15380
	Soluble in water	HEPG	FKM	ISO 15380
Flame-resistant	Water-free	HFDU (glycol base)	FKM	ISO 12922	90222
		HFDU (ester base)	FKM
		HFDR	FKM
	Containing water	HFC (Fuchs: Hydrotherm 46M, Renosafe 500; Petrofer: Ultra Safe 620; Houghton: Safe 620; Union: Carbide HP5046)	NBR	ISO 12922	90223
Important information on hydraulic fluids: For more information and data on the use of other hydraulicfluids, please refer to the data sheets above or contact us. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). The ignition temperature of the hydraulic fluid used must be 50 K higher than the maximum surface temperature. Bio-degradable and flame-resistant – containing water: If components with galvanic zinc coating (e.g. version "J3" or "J5") or parts containing zinc are used, small amounts of dissolved zinc may get into the hydraulic system and cause accelerated aging of the hydraulic fluid. Zinc soap may form as a chemical reaction product, which may clog filters, nozzles and solenoid valves - particularly in connection with local heat input. Flame-resistant – containing water: Due to increased cavitation tendency with HFC hydraulic fluids, the life cycle of the component may be reduced by up to 30% as compared to the use with mineral oil HLP. In order to reduce the cavitation effect, it is recommended - if possible specific to the installation - to back up the return flow pressure in ports T to approx. 20% of the pressure differential at the component.

Cartridge valve

Dimensions in mm

1	Name plate
2.1	Y port for pilot oil return, external
2.2	Port Y optionally for external pilot oil return
3	Adjustment type "4"
4	Adjustment type "5"
5	Adjustment type "6"
6	Adjustment type "7"
7	Hexagon SW10
8	Space required to remove the key
9	Valve mounting bores
10	Seal rings
11	Main spool insert
12	Seal ring
13	Seal ring
14	Seal ring
15	Support ring
16	Support ring

Valve mounting screws (separate order)

Quantity	Hexagon socket head cap screws	Material number
4	ISO 4762 - M8 x 40 - 10.9-flZn/nc/480h/C (Friction coefficient μtotal = 0.09 … 0.14) Tightening torque MA = 31 Nm ±10 %	R913015798

Quantity

Hexagon socket head cap screws

Material number

4

ISO 4762 - M8 x 40 - 10.9-flZn/nc/480h/C

(Friction coefficient μtotal = 0.09 … 0.14)

Tightening torque MA = 31 Nm ±10 %

R913015798

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Threaded connection

Dimensions in mm

1	Name plate
2.1	Y port for pilot oil return, external
3	Adjustment type "4"
4	Adjustment type "5"
5	Adjustment type "6"
6	Adjustment type "7"
7	Hexagon SW10
8	Space required to remove the key
9	Valve mounting bores
17	Pressure gauge connection

Version	D1	ØD2	T1
Version		mm	mm
"10"	G1/2	34	14
"15"	G3/4	42	16
"20"	G1	47	18
"25"	G1 1/4	58	20
"30"	G1 1/2	65	22

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Subplate mounting

Dimensions in mm

Required surface quality of the valve contact surface

1	Name plate
2.1	Y port for pilot oil return, external
2.2	Port Y optionally for external pilot oil return
3	Adjustment type "4"
4	Adjustment type "5"
5	Adjustment type "6"
6	Adjustment type "7"
7	Hexagon SW10
8	Space required to remove the key
9	Valve mounting bores
17	Pressure gauge connection
18	Identical seal rings for ports A and B Identical seal rings for ports X and Y
19	Port X without function (blind bore)
20	Locking pin

Version	L1	L2	L3	L4	L5	L6	L7	L8	L9	L10	B1	B2	B3	B4	B5	H1	H2	H3
Version	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
"10"	96	35.5	33	42.9	21.5	-	7.2	21.5	31.8	35.8	85	50	66.7	58.8	7.9	112	92	28
"20"	116	37.5	35.4	60.3	39.7	-	11.1	20.6	44.5	49.2	102	59.5	79.4	73	6.4	122	102	37
"30"	145	33	29.8	84.2	59.5	42.1	16.7	24.6	62.7	67.5	120	76	96.8	92.8	3.8	130	110	46

Valve mounting screws (separate order)

Version	Quantity	Hexagon socket head cap screws	Material number
"10"	4	ISO 4762 - M10 x 50 - 10.9-flZn/nc/480h/C (Friction coefficient μtotal = 0.09 … 0.14) Tightening torque MA = 60 Nm	R913015580
"20"	4	ISO 4762 - M10 x 60 - 10.9-flZn/nc/480h/C (Friction coefficient μtotal = 0.09 … 0.14) Tightening torque MA = 60 Nm	R913014770
"30"	6	ISO 4762 - M10 x 70 - 10.9-flZn/nc/480h/C (Friction coefficient μtotal = 0.09 … 0.14) Tightening torque MA = 60 Nm	R913014772

Subplates (separate order) with porting pattern according to ISO 5783, see data sheet 45100.

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Installation bore

Dimensions in mm

1	Notice: Bore Ø32 can cut into Ø45 at any position. However, it must be observed that the connection bores and valve mounting bore are not damaged.
2	Support ring and seal rings are to be inserted into this bore before assembly of the main spool!
3	Nozzle, separate order

1

Notice:

Bore Ø32 can cut into Ø45 at any position. However, it must be observed that the connection bores and valve mounting bore are not damaged.

2

Support ring and seal rings are to be inserted into this bore before assembly of the main spool!

3

Nozzle, separate order

产品分类

DR..-4-5X/...Y...型。

一般

液压

(如需在这些数值以外的工况下使用，请咨询我们！)

Cartridge valve

Valve mounting screws (separate order)

Threaded connection

Subplate mounting

Valve mounting screws (separate order)

Installation bore

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