PILOT OPERATED PRESSURE RELIEF VALVE - Series VR4V

Transcription

1 PILOT OPERTED PRESSURE RELIEF VLVE - Series VR4V The Veljan Pressure Relief Valve series VR4V are pilot operated and wk Internal Dra on the prciple of hydraulic balancg. These valves are used to limit the system pressure a hydraulic system and protect the system agast pressure overload. ccurate pressure control even under wide flow variations are achieved by these valves. The valves may also be used to generate a pressure drop a hydraulic circuit. VR4V consist of a high flow poppet type seat valve section controlled by the low flow, adjustable pilot section mounted on top. Pressure settg is achieved by means of knurled knob. F tamper proof settg, an acn nut with lead seal is available as option. Optional vent valve VVV1 sandwiched between pilot section and the ma body can be used f ventg the VR4V valves. External Dra Exceptionally fast response is obtaed due to the precise ratio between the ma piston area and its mass. High pressure stability is an outstandg feature of VR4V valves. VR4V3 pilot valve 1 (OPTIONL) VR4V6/1 pilot valve 1 (OPTIONL) Nmally pt is connected to pump and pt to tank. t low pressure, flow enterg pt is blocked by the ma poppet. Pressure at pt passes to the pilot section as well as to the top of the ma poppet through ifices. No flow takes place this ption until the pressure overcomes the sprg settg of the pilot cone. This pilot cone is lifted from its seat releasg a small pilot flow to tank and resultg a pressure drop across the ma poppet. The ma poppet opens and allows only enough flow from pt to pt matag let pressure at the set value of the pilot sprg. t drop of let pressure below the set value, the ma poppet closes stantly. Pilot dra is nmally through pt f ternal dra valves. External dra from pt is optional. Pt may be used f ventg remote control of VR4V valves.

2 PILOT OPERTED PRESSURE RELIEF VLVE - Series VR4V SPECIFICTIONS General Type : Pilot operated pressure relief Design : Poppet type Mountg : Threaded/Subplate/Cartridge/Flange Mountg position : Optional Pt sizes (nomal) : 3/8, 3/4, 1 1/4 Direction of flow : mbient temperature : -- C...+6 C (--4 F F) Special wkg conditions : Consult VELJN Hydraulics Pressure control range : 1-5 psi (7-35 bar) Maximum operatg pressure : Pt (let) 5 psi (35 bar) Pt (outlet) 45 psi (3 bar) Pt (pilot) 5 psi (35 bar) Pt, (Pilot dra ) 45 psi (3 bar) : VR4V 3 ( 3/ ) VR4V 6 ( 3/ 8 4 ) VR4V 1 ( 1 1/ 4 ) Nomal flow gpm ( lpm) : 16. (6) 53. () 119. (45) Maximum flow gpm ( lpm) : 4. (9) 8. (3) 159. (6) Fluid : Meral oil as per DIN 5154/5 other fluids on request Fluid Temperature Range : --18 C...+8 C ( F F) Viscosity Range : 1 to 65 cst (6 to 39 SSU) Optimum operatg viscosity : 3 cst (18 SSU) Seal compatibility : Code 1 (una N) Code 5 (Viton) (contact Veljan with specific oil details) Cleanless recoended : etter than NS 1638 Class 8 ISO 17/14 djustment Manual : Handwheel Rotation : 3.75 rev. Operatg tque :.7 Nm Electricals ( Vent Vavle VVV1) : Solenoid Nomal voltage : Refer to Orderg Code Permissible voltage fluctuation : +5%...--1% Max. coil temperature : +155 C (311 F) Type of current : lternatg Current (C)/Direct Current (DC) Input power : 31 W Holdg : 78 V Inrush : 64 V Relative operatg period : 1% Type of protection : I P 65

3 PILOT OPERTED PRESSURE RELIEF VLVE - Series VR4V ORDERING CODE VR4V W7-1 *** Series Size / 8 6-3/ / 4 Max.Pressure of Valve ody - f cartridges only 5-5psi (35 bar) ody Mountg Cartridge 1 - Cartridge pt = / 4 NPTF E - Cartridge pt = SE -4( 7/16 -UNF) G- Cartridge pt = G1 1 / 4 Threaded body Threaded body - VR4V3 = / NPTF ; VR4V6 = 1 NPTF,pts ( - Pts, 1 - Pt) = 1/ 4 - Threaded body VR4V6 = 3/ 4 NPTF ; NPTF VR4V1 = 1/ 4 NPTF (1 - Pt, 1 - Pt) Threaded body VR4V3 = /.S.P.P ; VR4V6 = 1.S.P.P ; ( - Pts, 1 - Pt),pts D - Threaded body VR4V6 = 3/ 4.S.P.P ; =G 1/ 4 VR4V1 = 1/ 4.S.P.P (1 - Pt, 1 - Pt) 4 - Threaded body VR4V3 - SE - 8, VR4V6 - SE - 16,pts =SE-4 ( - Pts, 1 - Pt) (7/ Threaded body VR4V6 - SE - 1, UNF) VR4V1 - SE - (1 - Pt, 1 - Pt) Subplate mountg 3 - Subplate mountg - VR4V3/6 /1 ISO ( pt - 1/ 4 NPTF ; with dra le code ) 7 - Subplate mountg - VR4V3/6 /1 ISO ( Pt - SE-4( 7/16 -UNF) 9 - Subplate mountg VR4V3/6 /1 ISO ( Pt / 4.S.P.P ; with dra le code ) Flange body - Flange body (, pt - 1/ 4 NPTF ) (-Pts,1-Pt) Modification Seal Class Solenoid Voltage (Omit f non vent version) Dra le una N ( Standard) - Viton Design letter W1-115V/6 Hz C GOR - 1V DC W - 3V/6 Hz C GOQ - 4V DC W6-115V/5 Hz C GOH - 48V DC W7-3V/5 Hz C Electrical Vent (3way VENT VLVE VVV1) Omit f non vent version 9 - With manual override (Solenoid de-energized : open to tank. Solenoid energized : vent le blocked) 1 - Without manual override (Solenoid de-energized : open to tank. Solenoid energized : vent le blocked) 11 - With manual override (Solenoid de-energized : vent le blocked Solenoid energized : open to tank) 1 - Without manual override (Solenoid de-energized : vent le blocked Solenoid energized : open to tank) 1 - Internal - External from subplate manifold () - External from pilot head ( 1) Type of Control 1-Hand knob (3 dia) -Hand knob (5 dia) (not f version with vent valve) 3-cn nut with lead seal Pressure settg range psi (7-15 bar) psi (7-1 bar) psi (7-35 bar) t subplate mountg only with body code 3,7,9

4 PILOT OPERTED PRESSURE RELIEF VLVE - Series VR4V PERFORMNCE CURVES p - qv - Characteristics (Fluid 6 cst at 4 C Test temp. 5 C+ 1%) VR4V3 VR4V6 VR4V1 Pressure drop bar(psi) ( ) P 1 (145) 8 (116) 6 (87) 4 (58) (9) Pressure drop bar(psi) ( ) P 1 (145) 8 (116) 6 (87) 4 (58) (9) Pressure drop bar(psi) ( ) P 1 (145) 8 (116) 6 (87) 4 (58) (9) 4 (5) (11) 6 (16) 8 (1) 9 (4) (13) (6) (4) (53) (66) 3 (79) (13) (6) (4) (53) (66) 3 (79) P-qv - Characteristics VR4V3 VR4V6 VR4V1 375 (5435) 35 (575) 375 (5435) 35 (575) 35 (575) 3 (435) 3 (435) 3 (435) Pressure p bar(psi) 5 (365) (9) 15 (175) 1 (145) Pressure p bar(psi) 5 (365) (9) 15 (175) 1 (145) Pressure p bar(psi) 5 (365) (9) 15 (175) 1 (145) 5 (74) 5 (74) 5 (74) 4 (5) (11) 6 (16) 8 9 (1) (4) (13) (6) (4) (53) (66) 3 (79) 1 (6) (53) (79) (16) (13)

5 PILOT OPERTED PRESSURE RELIEF VLVE - Series VR4V VR4V6 (3/4 ) SUPLTE MOUNTING OD ( #3, #7 & #9 ) Weight : 9.89 lbs ( 4.5 kg) 1 max. Panel openg ø øc3 3 9 ø5 4 1 lock mountg face Flatness.1 /1 length Surface fish CL 1.7 µm Location hole D D3 3 ø6 D6 D7 D8 D9 ø3 ø4 3/8"-16 UNC x.79 dp. ( M1 x dp.) 5 ø ø.41 ø ø.65 ø ø1.6 ø3. C3 Pts Function Pressure (let) Tank (outlet) Remote control vent connection ( 1) External dra1) ø4.645 ø118. ø.433 ø11. D D3 D6 D7 D8 D ø.8 ø ø.8 x ø7.1 x.315 dp. 8. dp. ø.9 ø3.4 1) Optional from pilot head subplate. Pt is only available at dra le (code ) external from the pilot head. Note : F details of Subplate & mtg. screws please refer page 16

6 PILOT OPERTED PRESSURE RELIEF VLVE - Series VR4V SUPLTE FOR VR4V6 (3/4 ) Weight : 1.54 lbs ( 4.8 kg) Location hole C ø17 C5 C ø18 ø ø4 13 3/8-16 UNC x.79 dp (M1 x dp) ø ø ø ø16.5 C3 C5 C ø.8 x.315 dp. ø ø7.1 x 8. dp. ø7.1 Order No. + Pt sizes + Dimension 4 Mountg screws* Order No. m.tensile strength VSS-P-16-G114 VSS--1-G115 VSS--16-G115 1 NPTF 3/4.S.P.P. 1.S.P.P 1/4 NPTF 1/4.S.P.P. 3/8-16UNC 1 3/4 lg M1 x 45 DIN V V7-716 at p< 1 bar = 1 dan/ - (Tque 68 Nm) at p>1 bar = 1 dan/ (Tque 8 Nm) * Mountg screws are cluded subplate der. F valves dered without subplate, mountg screws must be dered separately.

7 PILOT OPERTED PRESSURE RELIEF VLVE - Series VR4V VR4V6 (3/4 ) - THREDED OD ( #, # & #D ) Weight : 7.5 lbs ( 3.3 kg) max. C3 C5 C6 C7 ød D3 C3 C5 C6 C D D3.99 ø ø Pts 1) ) Function Pressure (let) Tank (outlet) Remote control vent connection External dra Pt Sizes 1 3/4 NPTF G 3/4 SE - 1 (1 /16-1 UNF) 1 3/4 NPTF G 3/4 SE - 1 (1 /16-1 UNF) 1/4 NPTF G 1/4 SE - 4 (7/16 - UNF) 1/4 NPTF G 1/4 SE - 4 (7/16 - UNF) 1) Closed when supplied ) Pt is only available at dra le (code ) external from the pilot head

8 PILOT OPERTED PRESSURE RELIEF VLVE - Series VR4V VR4V6 (3/4 ) - THREDED OD ( #1, #4 & #6 ) Weight : 14.5 lbs ( 6.6 kg) 1 max. 3 ø ø1.6 ø3. Pts () 1) ) Function Pressure (let) Tank (outlet) Remote control vent connection External dra Pt Sizes 1 NPTF G 1 SE - 16 ( 1 5 /16-1 UNF) 1 NPTF G 1 SE - 16 ( 1 5 /16-1 UNF) 1/4 NPTF G1/4 SE-4( 7/16 - UNF) 1/4 NPTF G 1/4 SE - 4(7/16 - UNF) 1) Closed when supplied ) Pt is only available at dra le (code ) external from the pilot head

9 PILOT OPERTED PRESSURE RELIEF VLVE - Series VR4V VR4V6 (3/4 ) - FLNGE OD ( # ) Weight : 14.5 lbs ( 6.6 kg) 1 max. 3 ø x 7/16"-14 UNC x.95 dp. (M1 x 3 dp.) 4 ø (Flange dimension) ø ø1.18 ø ø Pts Function Flange model no Flange der no Pt Sizes (x) Pressure (let) VFS4---6 VS /4.S.P.P Tank (outlet) VFS4-P--6 VS /4 NPTF Remote control - - 1/4.S.P.P vent connection External dra - - 1/4 NPTF Flanges must be dered separately. Mountg screws are cluded flange der.

10 PILOT OPERTED PRESSURE RELIEF VLVE - Series VR4V CRTRIDGES WITH PILOT VLVES VR4V6/VR4V1 ( #, #E & #G ) 1 max. (1/4 NPTF G 1/4" SE-4) Weight :.63 lbs ( 1. kg) 3 m max ø18 ø19 ø ø Orifice position (Orifice is content of delivery) ø7 1/16" NPTF 9 8 ø1 max 1r max r 17 5 = 1.6 = =.8 µmra D ød3 ød6 3/8"- 4 UNF x.79 dp. (M1 x dp.) / ø ø1.1./ ø.79.4 ø1.77/ / ø ø8. 5.8/ ø. 1. ø45./44. ø1.5/1.5 ø38.139/38.1 ø1.6 ø D D3 D ø.16/.36 ø3./6..375/ / / /31.95 ø.16 ø3. Pts Function 4 Mountg screws* Pressure (Inlet) Order No., 1) Tank (Outlet) External control connection Dra 3 3/8-4 UNF x 1 / 4 lg. M1 x 45, DIN V V ) Pt is only available at dra le (code ) external from the pilot head. * Mountg screws must be dered separately