PILOT OPERTED CHECK VLVE - Series VCV Veljan Pilt Operated Check Valves VCV are with pilt cntrl fr hydraulic unlckg. These are sprg-laded pppet type valves. Muntg cnfiguratin f VCV are accrdg t Internatinal Standards such as CETOP, DIN, ISO r NFP. Standard versins available are subplate muntg L - bdy and T - bdy. VCV valves can be used as bdy type units r cartridges fr manifld applicatin. VCV valves have zer-leak cnditin fr flw frm prt t prt and free flw ppsite directin. The blcked flw (zer-leak) directin can be unblcked hydraulically via a cntrl pistn. small cntrl pistn and strke is enugh t unblck the flw. Thus the lw pilt il vlume f.6 ml results a fast respnse time. VCV Pilt perated check valves wrks as a nrmal check valve fr flw frm prt t prt. Flw frm prt t prt is blcked. T achieve flw frm prt t prt, a pilt pressure is necessary at pilt prt which allws the cntrl pistn t push the cntrl cne frm its seat. The cntrl cne pushes the cntrl spl t blck flw frm prt t sprg chamber cnnected behd the cntrl cne and sprg side f ma spl. Simultaneusly, the sprg chamber gets cnnected t prt thrugh unseated cntrl cne and, n availability f pressure at prt, the ma pppet pens t allw flw frm prt t prt. On unladg the pilt le (), the valve wrks as a nrmal check valve.
PILOT OPERTED CHECK VLVE - Series VCV SPECIFICTIONS General Type : Pilt Operated Check Valve Design : Pppet Type Muntg : VCV3 : Threaded bdy/subplate muntg/cartridge VCV6 : Threaded bdy/subplate muntg/cartridge/flange bdy VCV : Threaded bdy/subplate muntg Muntg Psitin : Optinal Prt sizes : 3/ 8, 3/, / Directin f flw : Optinal, free flw frm Pilt perated flw frm mbient temperature range : -- C...+6 C (-- F... F) Special wrkg cnditins : Cnsult VELJN Hydraulics Operatg pressure range : Mimum - 5 psi (3.5 bar) Maximum - 5 psi (35 bar) Crackg pressure : See mdel cde : VCV 3 ( 8 ) VCV 6 ( ) VCV (/ ) Maximum flw gpm (lpm) : 8 (8) 95 (36) 59 (6) Nmal flw gpm (lpm) : (5) 7 (7) (5) Fluid : Meral il as per DIN 55/5 r ther fluids n request Fluid temperature range : -8 C...+8 C ( F... 76 F) Viscsity recended : 3 cst (8 SSU) Type f actuatr Hydraulically : Pilt perated Pilt pressure range : Mimum - 7 psi (5 bar) Maximum - 5 psi (35 bar) Pilt il vlume : t peng rati : 8 =.6 ml : =.6 ml : 3 =.6 ml : =.8 ml Mimum hldg pressure : t peng rati :8/: = 7psi (5bar) fr pilt pistn (dependent : 3 = 6 psi (bar) f pressure at prts &) : = 35psi (bar) Nte : Where prts & Y are applied with pressure, this pressure has t be cnsidered as fllws. With pressure at prt, the necessary pressure at prt will be.6 times lwer than at. With pressure at prt Y, the necessary pressure at prt will be.6 times higher than at Y as a mimum. p p p. p nec. = +.6-6 =...bar Y
PILOT OPERTED CHECK VLVE - Series VCV ORDERING CODE VCV - 5 3 - - *** Mdificatin Series VCV - Check valve (pilt perated) Size 3-3/ 8 3 6 - / -/ Seal Class - una N (Standard) 5 - Vitn Design letter Max Pressure 5 - fr cartridges nly - fr bdy valve valves nly dy Muntg 5 psi (35 bar) Cartridge - Cartridge (VCV3/VCV6) ; prt = / NPTF G - Cartridge (VCV3/VCV6) ; prt = G / Threaded bdy - Threaded bdy - VCV3 = / NPTF ; VCV6 = NPTF, prts (-Prts,-Prt) 3 - Threaded bdy - VCV6 = / = / NPTF ; NPTF VCV = / NPTF (-Prt,-Prt) 6 - Threaded bdy - CV3 = /.S.P.P. ; VCV6 =.S.P.P. D - (-Prts,-Prt) Threaded bdy - VCV6-3/, prts.s.p.p. ; VCV = / =G /.S.P.P. (-Prt,-Prt) Subplate muntg 3 - Subplate muntg VCV3/6/ ( prt - / NPTF ) 9 - Subplate muntg VCV3/6/ ( Prt = /.S.P.P ) Flange bdy - Flange bdy (, prt - / NPTF ) (-Prts,-Prt) = = 6= Crackg Pressure (apprx.) Flw Flw VCV3 VCV6/ VCV3 VCV6/ bar bar bar bar...5.7. 3.5 5.5 6... 3. 3.8 dy Head - Pilt Cntrl Head - Openg rati : 3 - Pilt Cntrl Head - Openg rati 3: 8 - Pilt Cntrl Head - Openg rati 8: 9 - Pilt Cntrl Head - Openg rati :
PILOT OPERTED CHECK VLVE - Series VCV PERFORMNCE CURVES p - qv - Characteristics (Fluid 6 cst at C Test temp. 5 C+ %) (7) VCV3 Pressure drp p bar (psi) (5) 8 (6) 6 (87) (58) (9) 5 (3.) (6) Flw qv lpm (gpm) 5 () (53) (7) VCV6 Pressure drp p bar (psi) (5) 8 (6) 6 (87) (58) (9) (6) (53) 3 (79.5) (6) Flw qv lpm (gpm) (7) VCV Pressure drp p bar (psi) (5) 8 (6) 6 (87) (58) (9) (6) (53) 3 (79.5) (6) (3) 6 (58) Flw qv lpm (gpm)
PILOT OPERTED CHECK VLVE - Series VCV VCV ( / ) SUPLTE MOUNTING ( #3 ) Weight :.96 lbs (5.9 kg) Dra prt Y (/".S.S.P. r /" NPTF cnnect here nly) Panel peng C C 3 Ø 9 C5 C6 6 8 ø7 5 3 lck muntg face Flatness. / length Surface fish.8 Muntg cnfiguratin D5 D3 D D D D6 D7 ød 5 D 6 D8 ød ød3 7 3/8-6 UNC x.79 dp. (M x. dp.) D9 Lcatin hle 3 5 6 7 8 9.89.66 3.86 3.5 5.65.35 ø.5 ø...8 ø.65. 8. 97.7 8. 3.5 8. ø6.35 ø.5 9. 3. ø6.5 3 5 6 5.89.35.83.7.75 3.8.878 Prts. 9. 7.9 9.8. 96.8 7.7 Functin C C 6.3.56 3.35 ø.35 5.33.88 6. 37. 8. ø9. 38.. D D D3 D D5 D6 D7 D8 D9 D D D 3.35.657.657.97.657 3.8 3.653.96 8. 67.5..6 6.7 96.8 9.8 8..7 6.7.7 ø.6. ø3. ø.8 x ø7. x.33 dp.. dp. Free flw Nrmally clsed pilt t pen External pilt prt External dra Nte : Fr details f Subplate & mtg. screws please refer page 37
PILOT OPERTED CHECK VLVE - Series VCV VCV ( / ) SUPLTE Weight : 8.68 lbs (8.5 kg) 5 6 3 3/8-6 UNC x.78 dp. (M x dp.) C C6 Y 8 7 9 ø8 ø7 Y ø9 ø6 r 5 ø C C5 ø 3 Lcatin hle 3 3 5 6 7 8 9 3 5 6 7 8 9 3.35.657.3.657.968.657 3.8.8 3.653.95.5 6.53.7 6.5 5.3 ø.6 ø.8 ø.8 8. 67.5 59.5..6 6.7 96.8.6 9.8 8. 3.8 66. 6.7 65. 38. ø3. ø7. ø7. ø.8 x ø7. x.33 dp.. dp. 3 ø.35 ø9..97 5..38 35. ø.59 ø5. C C C5 C6 3.35 8..3 59.5.97.5.66 8..76.76 69. 9. **Nte : Prt Y must nt be cnnected t subplate.r. r Order N. VSS - P - - G 6 VSS---G7 + Prt sizes +Y** /.S.P.P. 6 Muntg screws* Dimensin Order N. m.tensile strength / NPTF / NPTF 3/8-6UNC 3 / lg. V358-6 at p< bar = dan/ - (Trque 68 Nm) at p> bar = dan/ /.S.P.P Mx5 DIN 9 -.9 V7-76 (Trque 8 Nm) * Muntg screws are cluded subplate rder. Fr valves rdered withut subplate muntg screws must be rdered seperately.
PILOT OPERTED CHECK VLVE - Series VCV VCV ( / ) - THREDED ODY (#&D) Weight :.8 lbs (5.5 kg) 3 5 6 3.88..878 7.7 5.56 33.5.78.6 3.9 3. 3 3.37 85.7 3.76 95.5 3.63 77.8 5. 5. 6.96 38. Prts Functin Prt sizes (x) Free flw Nrmally clsed pilt t pen /.S.P.P r / NPTF External pilt prt External dra /.S.P.P. r / NPTF