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预充阀ZSF系列

发布日期：2019-03-25　阅读：次

特征

Technical data

general

¹⁾	Working direction of the control spool

Size			32	40	50	63	80	100	125	160	200
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
Flow (Δp = 0.3 bar)			Depending on the case of application, see below
Druckflüssigkeit			see table
Hydraulic fluid temperature range		°C	-30 … +70
Viscosity range		mm²/s	10 … 800
Maximum admissible degree of contamination of the hydraulic fluid ²⁾			Class 20/18/15 according to ISO 4406 (c)

¹⁾	Pressure differential at the main poppet for overcoming the spring force
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.

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	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, Petrofer Ultra Safe 620)	NBR	ISO 12922	90223
Important information on hydraulic fluids: For further information and data on the use of other hydraulic fluids, 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. Flame-resistant – containing water: Maximum pressure differential 210 bar, otherwise, increased cavitation erosion Life cycle as compared to operation with mineral oil HL, HLP 30 … 100% Maximum hydraulic fluid temperature 60 °C Bio-degradable and flame-resistant: If this hydraulic fluid is used, small amounts of dissolved zinc may get into the hydraulic system.

Size of the filling tank at least 1.5 x cylinder content

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

Note:

Wrong dimensioning of prefill valve and suction line may cause cavitation and consequential damage.

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
a	at least 300 mm with extended cylinder
b	up to 1000 mm with the specified maximum flows
c	h ≤ 500 mm
h	300 mm ≤ h < 500 mm

For applications outside these parameters, please consult us!

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