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预充阀SFS系列

发布日期：2019-03-25　阅读：次

尺寸200 ... 300
组件系列4X
最大工作压力350 bar
最大流量14000升/分钟

特征

用于法兰连接的液压主动切换预充阀（止回阀）
由于两端有效的终端位置缓冲，降低了开关噪音
优化的切换时间特性

Technical data

general

Size		200	250	300
Weight	kg	190	380	655
Installation position		any

NG	Maximum switching time in ms ¹⁾
	Close	Open
	ms	ms
200	60	70
250	70	80
300	110	90

¹⁾	At X, X1 = 150 bar. The switching time depends on the line resistance, control valve and pilot flow.

hydraulic

Size			200	250	300
Maximum operating pressure	Anschluss A	bar	16
	Port B	bar	350
	Anschluss X	bar	150
	Anschluss X1	bar	150
Maximum flow	Case of application 1	l/min	5600	10000	14000
	Case of application 2	l/min	4340	6775	9750
	Case of application 3	l/min	3770	5890	8480
	Case of application 4	l/min	1510	2360	3400
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 ¹⁾			Class 20/18/15 according to ISO 4406 (c)

¹⁾	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)

Information on case of application 1 to 4

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

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.

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

For applications outside these parameters, please consult us!

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