Product Name: Hydac DRV25 Needle Valves Product Brand: Hydac Product Code: DRV25 Product Artikel: Art.Nr. 505111705574
Needle
Valves with and without Reverse Flow Check Direct-Acting Inline Mounted - 350 bar DV- / DRV- 06 to 16 ·
For regulating the speed of loads ·
For fine adjustment and shut-off of the flow ·
For system-related damping in hydraulic
circuits ·
To release pressure from accumulator systems ·
As an emergency drain for lowering a load
without a dead man's circuit ·
Spindle secured before complete loosening ·
An Allen set-screw locks the setting of the
knob ·
Choice of five sizes ensures best possible
adaptability to the system ·
Drop forged housings with high safety factor Operating pressure: max. 350 bar Nominal flow: DV- / DRV-06 max. 20 l/min DV- / DRV-08
max. 50 l/min DV- / DRV-10 max. 60 l/min DV- / DRV-12 max. 90 l/min DV- /
DRV-16 max. 180 l/min Cracking pressure (DRV): 0.5 bar Media operating temperature range: min. -20 °C to max.
+100 °C Ambient temperature range: min. -20 °C to max. +100 °C Operating fluid: Hydraulic oil to DIN 51524 Part 1, 2 and
3 Viscosity range: min. 2.8 mm²/s to max. 800 mm²/s Filtration: Class 21/19/16 according to ISO 4406 or
cleaner Installation: no orientation restrictions, preferably
horizontal Materials: Valve body: steel Piston: hardened and ground
steel Seals: FKM (standard) Back-up rings: PTFE Weight: DV-06 = 0.10 kg DRV-06 = 0.10 kg DV-08 = 0.26 kg DRV-08 = 0.28 kg DV-10 = 0.38 kg DRV-10 = 0.41 kg DV-12 = 0.62 kg DRV-12 = 0.65 kg DV-16 = 1.04 kg DRV-16 = 1.14 kg The DV is an inline mounted flow control valve which
controls the flow by adjusting the cross-section. The flow rate is therefore
dependent on the pressure differential and viscosity. Starting with the
throttle spindle in the fully closed position, the flow rate increases in
accordance with the appropriate curve as the control knob is turned. The flow
is controlled in both directions. The scale on the lower edge of the control
knob enables accurate repeat setting.
The DRV is a flow control valve in the same design which
also allows the same fine flow adjustment, but in one direction only. Unrestricted
flow in the reverse direction is via the built-in check valve (cracking
pressure 0.5 bar).
