VRIEO2
5Pages

Catalog excerpts

PRESSURE CONTROLS - FEATURES Veljan Pressure control valves are superior in performance and design - even under high flow conditions at maximum Series VR1 E02 is a direct operated pressure relief valve designed to control system pressure remotely. Pilot operated pressure control valves series VR4* &VR5* consist of two valve sections: a highflow poppet type seat valve section controlled by the low flow and adjustable pilot section mounted on top. VR4* series are offered for various mounting options, subplate or pipe mounted, or as cartridge assemblies for manifold applications. VR5* series pressure control valves are flange type suitable for mounting directly on pump delivery port thereby minimising piping and saving space. The internal operating components of flange mounted Pressure Controls (VR5* series) are same as those of Pressure Relief Valves (VR4V/VR5V) offer precise and smooth limitation of the system pressure in a hydraulic Pressure Unloading Valves (VR4U/VR5U) are used to unload a circuit at preset low pressure when a pilot signa higher than the preset low pressure from external source is maintained (at PortX). This saves considerable energy. Pressure Reducing Valves (VR4R) are used to control reduced pressure in the secondary part of a hydraulic system than its primary part and to maintain this pressure asset by the control knob on the pilot. Pressure Sequence Valves (VR4S/VR5S) are used to operate the hydraulic system in a pressure sequence. After system pressure of the primary part of a system reaches to the preset value of the valve, the valve opens and allows flow to the seconda ry pa rt of the system. With a wide range of springs, it is possible to opt for precise setting of the pressures. Pressure settings are achieved by means of knurled hand knobs (option of two sizes) or an acorn nut or key lock knob. Clockwise rotation All valves have pressure take-off orifices, external or internal drain and have the option of an integrally mounted Vent Valve (VW01 ) which does not require any additiona FAST RESPONSE The poppet design seat valve with pilot control delivers the minimum possible friction, eliminates system shocks and optimum response to changes in operating conditions. An exceptional fast response is possible due to the precise ratio between the main piston area and its mass. The outstanding design features of the pilot section allows for high pressure stability. Response time (depending on the function) varies from 20 HIGH PERFORMANCE The VR4*/VR5* series valves are designed for high pressures with the option of different spring settings for sensitive control. The poppet design reduces pressure over travel cracking flow to a minimum, thus reducing power losses at high operating pressures. ELECTRICALLY VENTED VALVE This optionally available solenoid operated Vent Valve WVOl is used for venting VR4*/VR5* series valves for pressure control from remote. This valve is integrally mounted and sandwiched between the pilot section and main body section of the pressure control valves and hence requires no additional piping. STANDARDIZED MOUNTING Mounting configuration of Pressure Controls VR4* series are in accordance with standards such as NFPA, or ISO, DIN, CETOP. Subplate Mounting, L or T body is standard. VR5* series are flange body units which facilitate direct mounting on a SAE pump outlet flange. In addition to the above mounting options, cartridge assembly can be offered for manifold applications.

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REMOTE CONTROL PRESSURE RELIEF VALVE - Series VRl E02 Veljan Series VRl E02 Remote Control Valves are direct operated Pressure Relief Valves. These are usable as remote control valves for all pilot operated pressure control valves e.g Veljan series VR4 & VR5. These may be located upto 3 meters distance from the main valves and are used to control maximum circuit pressure of any degree below the main valve pressure setting. These seat type valves mainly consist of a seat, cone and a pressure spring. The valve is leak-free below the setting pressure. A damping spool maintains a stable...

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REMOTE CONTROL PRESSURE RELIEF VALVE - Series VRl E02 Optional adjusting devices Hand knob with lead sealt

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REMOTE CONTROL PRESSURE RELIEF VALVE - Series VRl E02 Mounting screws are included in subplate order. For valves ordered without subplate, mounting screws must be ordered separately.

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