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预填阀SFA系列
发布日期:2019-03-25 阅读:

  • 大小25 ... 80
  • 组件系列1X
  • 最大工作压力350 bar
  • 最大流量1200 l / min
特征
  • 先导式止回阀
  • 用于螺纹连接(NG25和32)
  • 用于法兰连接,符合ISO 6162-1(NG40)
  • 用于直接连接工作缸
  • 有或没有预减压,可选
  • 集成高压端口
 Technical data

general

Nenngröße

25 32 40 50 63 80

Weight (approx.)

kg

4.5 6 7 10.5 16 23

Installation position

any

Ambient temperature range

°C

-30 … +80

hydraulic

Size

25 32 40 50 63 80

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

125 200 300 500 800 1200

Case of application 2

l/min

90 170 250 400 650 1000

Case of application 3

l/min

60 140 220 360 560 900

Case of application 4

l/min

40 100 150 240 380 620

Case of application 5

l/min

20 70 110 170 280 450

Druckflüssigkeit

see table

Hydraulic fluid temperature range 3)

°C

-30 … +80

Viscosity range

mm²/s

10 … 800

Maximum admissible degree of contamination of the hydraulic fluid 4)

Class 20/18/15 according to ISO 4406 (c)
1) Pressure differential at the main poppet for overcoming the spring force
2) A to B
3) At the valve working ports
4) 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.

Hydraulic fluid

Classification

Suitable sealing materials

Standards

Mineral oils and related hydrocarbons

HL, HLP, HVLP

NBR, FKM 3)

DIN 51524

Bio-degradable

Insoluble in water

HETG

NBR, FKM 3)

VDMA 24568

HEES

FKM 3)

Soluble in water

HEPG

FKM 3)

VDMA 24568

Flame-resistant

Water-free

HFDU, HFDR

FKM 3)

ISO 12922

HFC

NBR

ISO 12922

Important information on hydraulic fluids!

Flame-resistant and bio-degradable:

3) Upon request

Flow ‒ case of application 1 (A to B)

Flow ‒ case of application 2 (A to B)

Flow ‒ case of application 3 (A to B)

Size of the filling tank at least 1.5 x cylinder content

Flow ‒ case of application 4 (A to B)

Flow ‒ case of application 5 (A to B)

Information on case of application 2 to 5

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

3

This sheet is not included in the scope of delivery. With smaller tank dimensions and minimum hydraulic fluid level (a), it prevents the formation of tunnels.

4

Observe the supply cross-section ‑ differs depending on the size!

a

min. 300 mm with extended cylinder

b

max. 1000 mm with the specified maximum flows

c

≥ 500 mm

h

~ 300 mm to max. 500 mm

For applications outside these parameters, please consult us!

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