Артикул: RX7461

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Prefill valves SFE

Name: Prefill valves SFE
Brand: Bosch Rexroth
SKU: RX7461

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Description

Size 25 … 100
Component series 1X
Maximum operating pressure 350 bar
Maximum flow 2000 l/min

Features

Cartridge valve
Pilot operated prefill valve (check valve)
Block or cylinder installation

Product description

Type "SEF . Z" (with optional cover type "LFF")

Type code

01	02	03	04		05		06	07
SFE			0	–	1X	/	M	*

01	Prefill valves	SFE
02	Size 25	25
	Size 32	32
	Size 40	40
	Size 50	50
	Size 63	63
	Size 80	80
	Size 100	100

03	Block installation	P
	Cylinder installation 1)	Z
04	without pre-decompression	0
05	Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) - Size 10	1X
Seal material
06	NBR seals (other seals on request)	M
06	Observe compatibility of seals with hydraulic fluid used.
07	Further details in the plain text	*

1) Control cover type “LFF” incl. matching mounting kit (separate order, see page 8):

With NG25 and 32, alternative control covers type "LFA.D-7X/....F…" (see RE 21010) may be used.

Technical data

general

Size		25	32	40	50	63	80	100
Weight	kg	0.53	1.05	1.94	3.2	6.48	10.3	22.15
Installation position		any
Ambient temperature range 1)	°C	-30 … +80

NBR seals

hydraulic

Size			25	32	40	50	63	80	100
Maximum operating pressure	Port P	bar	350
	Anschluss A	bar	16
	Port B	bar	350
	Anschluss X	bar	150
Cracking pressure 1)		bar	≈ 0.12
Maximum flow 2)	Case of application 1	l/min	100	170	240	360	580	810	1210
	Case of application 2	l/min	90	140	200	320	510	710	1070
	Case of application 3	l/min	60	100	140	220	350	480	730
	Case of application 4	l/min	50	70	100	160	260	360	540
Druckflüssigkeit			Mineral oil (HL, HLP) to DIN 51524;fast bio-degradable hydraulic fluids according to VDMA 24568; HETG (rape seed oil); other hydraulic fluids on enquiry
Hydraulic fluid temperature range		°C	-30 … +80
Viscosity range		mm²/s	10 … 800
Maximum admissible degree of contamination of the hydraulic fluid 3)			Class 20/18/15 according to ISO 4406 (c)

1)	Pressure differential at the main poppet for overcoming the spring force
2)	Pulling function (A to B)
3)	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.

Flow ‒ case of application 1 (A to B)

Flow ‒ case of application 2 (A to B)

Size of the filling tank at least 1.5 x cylinder content

Flow ‒ case of application 3 (A to B)

Flow ‒ case of application 4 (A to B)

Attention!

Faulty dimensioning of prefill valves and connection lines may lead to cavitation effects. The consequences affect the reliability and durability of products!

Attention!

An underdimensioned prefill valve and/or an underdimensioned line leads to gas leaks from the hydraulic fluid with corresponding consequences and often to long-term damage at the cylinder seals.

Notice!

For limit areas, please contact us. It is often sufficient, to select a pipeline which is one size larger.

1	Cylinders
2	Prefill valve
a	at least 300 mm with extended cylinder
b	up to 1000 mm with the specified maximum flows
c	≤ 500 mm
h	300 mm ≤ h ≤ 500 mm