Power Valve Precision Regulator

Transcription

1 Power Valve Precision Regulator VEX Series High precision, large capacity relief regulator port large exhaust capacity pressure reducing valve which utilizes a nozzle flapper mechanism available as air operated or manual types. Precise pressure setting Having a relief Cv value that is similar to the supply Cv value, this regulator responds quickly in order to set a precise outlet pressure even when the outlet volume and the pressure fluctuations are large. High precision This regulator is well-suited for balancer applications because it minimizes pressure fluctuations with its large-volume supply/exhaust capability, in addition it features high precision F.S. (full span) sensitivity within.% and F.S. repeatability of ±.5%. Manifold capable VVEX / Up to stations VVEX / Up to stations Minimum size VEX Non-grease only for VEX Seal materials (NR, FKM) only for VEX Rich line-up s available from to inches, most flow rates and pipes can be accommodated. Minimum size Manual knob type ir operated type

2 Power Valve/Precision Regulator VEX Series pplication Example Relief Type Regulator Precise internal tank pressure setting Precision regulator TNK Large effective areas of both supply and exhaust sides make it possible to precisely set large-flow internal tank pressure. ccurate Pressure Setting Sensitivity within.% F.S. (Full span) Tension control RJ R5 to 95 RX MR RM RP IR - IR Contact Pressure Control Winding roller Low friction type Drive roller alance and Drive ccurate balance pressure setting IRV VEX SRH SRP SRF ITV IC ITVH ITVX PVQ Pressure is kept steady, responding rapidly to the position change of the piston in the cylinder. Pressure changes during cylinder actuation are suppressed, balancing the cylinder in both static and dynamic conditions. VY V VT P

3 VEX Series Specifications Operation Pilot Model Fluid Supply pressure Setting pressure range mbient temperature () Fluid temperature () Repeatability Sensitivity Linearity () ir consumption () Mounting Weight (kg) Port (P) () (R) VEX VEX VEX VEX VEX VEX5 VEX7 VEX9 6 Manual knob (Push locking slotted type) Manual knob (Push locking slotted type) and ir operated type Internal pilot External pilot can be switched. Refer to How to Switch to External Pilot on page. Refer to pplicable Fluids. ir (Set pressure +. MPa) to Max. MPa Refer to Precautions.. to.7 MPa.5 to.7 MPa to 6 C to 6 C (VEX ) to 6 C to 99 C (VEX ) Within ±.5% F.S. (Full span) Within.% F.S. (Full span) Within ±% F.S. (Full span) 9.5 L/min (NR) (at supply pressure. MPa) Free.5. ().. ().5. Note ) No condensation. Note ) Large amount of air is exhausted all the time. Note ) pplicable only to air operated type. Note ) With sub-plate. Note 5) Non-lubricated specifications are not available for valve sizes to 9. pplicable Fluids Model VEX (Seal material: NR seals) VEX (Seal material: FKM seals) Fluid ir (Normal, Dry) High temp. air (Max. 99 C) Symbol P () (R) (P) () (R) (P) ir operated type Manual knob type

4 Power Valve/Precision Regulator VEX Series VEX Regulator valve ody size ody size ody ported ase mounted VEX 5 Regulator valve Type Precision regulator Port 6 Nil Operation Manual knob Type Precision regulator Operation ody size ody size ody ported ase mounted Option () How to Order Seal material Nil Note) F G NR seals FKM seals Refer to pplicable Fluids on page. Port (P), (), (R) Nil Without sub-plate ir operated type Manual knob type (P), () (R) Without sub-plate Description racket (With bolt and washer) Foot (With bolt and washer) Pressure gauge () G Silencer for bleed port (PE) N N- Note ) Not conforming to ISO79-. Note ) The optional parts are shipped in the same package. Note ) If a pressure gauge other than that which is indicated in the option table is to be used, also enter the part number of the pressure gauge. Refer to the pressure gauge guide in est Pneumatics No. 7 for details. Example: VEX- G6-- F G N G F G N Option Threads (/ only) Nil Rc F G Note ) N NPT T NPTF Thread type Nil Rc F G Note ) N NPT T NPTF Option racket Foot Pressure gauge Silencer for bleed port racket Foot Pressure gauge Silencer for bleed port Part no. Caution Using the External Pilot. If a pressure difference over. MPa between the supply and the set pressure cannot be maintained, change to an external pilot to obtain the necessary pressure difference.. If a mist separator cannot be installed on the supply side, change to an external pilot, and make sure to install a mist separator on the pilot side. How to Switch to External Pilot. Using a flat head screwdriver, remove the fixed orifice from port P.. Install the fixed orifice facing in the opposite direction (external pilot). Install it carefully to prevent damage to the O-ring.. Tighten the fixed orifice again and connect the pilot piping to port P using an fitting. Dimensions of port P <Internal pilot> Fixed orifice <External pilot> Position for port P Port P Fittings for For VEX (NR seals) Fixed orifice assembly (with O-ring) part no.: VEX-- For VEX (FKM seals) Fixed orifice assembly (with O-ring) part no.: VEX-- Note) O-rings cannot be shipped as a single unit. VEX VEX VEX VEX VEX VEX5 VEX7 VEX9 VEX-- VEX-- VEX-- VEX-- VEX- VEX5- VEX7- VEX9- G7--R-X7 G7-- G6-- G6-- RJ R5 to 95 RX MR RM RP IR - IR IRV VEX SRH SRP SRF ITV IC ITVH ITVX PVQ VY V VT P

5 VEX Series Sub-plate/ase Gasket Part No. Valve body size VEX-- P VEX-9- P Sub-plate Symbol / Symbol Nil F N T Thread type Thread type Rc G Note) NPT NPTF Symbol / / Symbol Nil F N T Thread type Thread type Rc G Note) NPT NPTF VEX- ase gasket Seal material Symbol Seal material Nil NR seals FKM seals VEX-- Note) Not conforming to ISO79-.

6 VEX Series Manifold Specifications Specifications pplicable valve Valve stations ir passage Pilot Pilot port size Port (P), (), (R) lanking plate Nil VVEX 5 Internal pilot VEX VEX-5 (With gasket and mounting bolt) Common supply/exhaust Common external pilot Internal pilot x. VVEX 5 Valve stations stations Valve stations stations VEX to stations Note) to stations Note) Seal material NR seals FKM seals Common external pilot x. VEX-7 (With gasket and mounting bolt) Note) Pressurize to Port (P) and exhaust from Port (R) on the both sides for six stations or more of VEX and/or five stations or more of VEX. Set Pressure Characteristics (ir Operated Type) ody size Pilot type Internal pilot Common external pilot ody size Pilot type Internal pilot Common external pilot stations stations List symbols in the order of precision regulators and blanking plates for manifolds from the left-hand side (Port () faces this side) of the manifold base. Ex.) VVEX--5- VEX-G pieces VEX-7 piece Note) Not conforming to ISO79-. Set Pressure Characteristics (Manual Knob Type) How to Order Nil F N T Thread type Nil F N T Thread type Rc G Note) NPT NPTF Rc G Note) NPT NPTF RJ R5 to 95 RX MR RM RP IR - IR IRV VEX SRH SRP SRF ITV IC ITVH ITVX PVQ VY V VT P Signal port P Pressure (MPa) Knob rotation (Cycles) 5

7 VEX Series Flow Rate Characteristics VEX, VEX- VEX, VEX - VEX - Port (P) pressure: MPa (R) () L/min(NR) (P) () (R) () L/min(NR) (P) () (R) () L/min(NR) (P) () (Relief exhaust) Flow (Pressure reducing supply) (Relief exhaust) Flow (Pressure reducing supply) (Relief exhaust) Flow (Pressure reducing supply) VEX5-6 VEX7 - VEX9 - (R) () L/min(NR) (P) () (R) () L/min(NR) (P) () (R) () L/min(NR) (P) () (Relief exhaust) Flow (Pressure reducing supply) (Relief exhaust) Flow (Pressure reducing supply) (Relief exhaust) Flow (Pressure reducing supply) Pressure Characteristics VEX, VEX VEX, VEX VEX Port (P) pressure:.7 MPa, Port () pressure:. MPa, Flow: L/min (NR) Set point Set point Set point Port (P) pressure (MPa) Port (P) pressure (MPa) VEX5 VEX7 VEX9 Port (P) pressure (MPa) Set point Set point Set point Port (P) pressure (MPa) Port (P) pressure (MPa) Port (P) pressure (MPa) 6

8 Power Valve/Precision Regulator VEX Series Construction/Working Principle VEX, VEX Retainer Lower diaphragm ody Main valve part Spring Valve Valve guide Upper diaphragm (R) (P) () Precise pilot valve When set-knob o is turned clockwise, the force generated by set spring! causes flapper! to close nozzle!, allowing the nozzle back pressure to be applied to the right surface of top diaphragm e. Then, valve y moves to the left, allowing the supply air to flow from port (P) to port (). The air pressure that has flowed in is applied to the left surface of top diaphragm e and counteracts the force generated by the nozzle back pressure; at the same time, it is applied to the left surface of diaphragm!, and balances with the set pressure that counteracts the compression force of set spring!. When the outlet pressure increases higher than the set pressure, it pushes diaphragm! towards the right, and the pressure at the right side of top diaphragm e decreases, causing top diaphragm e to move to the right. Then, valve y moves away from the left surface of top diaphragm e, the outlet pressure flows from port () via the valve hollow and is discharged through port (R) (atmosphere). If set knob o is turned conterclockwise, the movement will be the opposite, the outlet pressure will decrease, and will balance with a newly set pressure. Component Parts Diaphragm Nozzle Fixed orifice Flapper No. Description Material ody onnet Upper diaphragm Spring Valve guide Valve Retainer Lower diaphragm Zinc alloy die-casted luminum alloy die-casted NR/FKM Stainless steel Stainless steel NR/FKM Resin NR/FKM Replacement Parts No. 9 Description Knob Part no. V- djustment spring onnet Knob VEX, VEX, VEX, VEX5 VEX7, VEX9 Manual knob type Precise pilot valve Main valve part Precise pilot valve onnet Flapper No No. 9 Nozzle Diaphragm Piston Shaft ody Poppet valve (ir supply) Spring Valve guide Zero adjusting screw Diaphragm Flapper Nozzle Diaphragm (R) (P) P() port pressure Component Parts ir operated type Description ody onnet Regulating piston Spring Valve guide Poppet valve Shaft Valve guide Replacement Parts Description Knob () Feedback pressure Knob djustment spring Fixed orifice Valve guide Spring Poppet valve (ir exhaust) Signal port When set-knob o is turned clockwise, the force generated by set spring! causes flapper! to close nozzle!, allowing the nozzle back pressure to be applied to the top of piston e. Then, via shaft u, poppet valve (supply air) y opens, allowing the supply air to flow from port (P) to port (). The air pressure that has flowed in is applied to the bottom surface of piston e and counteracts the force generated by the nozzle back pressure; at the same time, it is applied to the bottom surface of diaphragm!, and balances with the set pressure that conteracts the compression force of set spring!. When the outlet pressure increases higher than the set pressure, it pushes the diaphragm! upward, the pressure at the top surface of piston e decreases, causes piston e to move upward, opens poppet valve (exhaust) y via shaft u, and is discharged through port (R) to the atmosphere. If set-knob o is turned counterclockwise (if the set pressure of the pressure-reducing valve connetcted to the signal port is decreased), the movement will be the opposite; the outlet pressure will decrease and balance with a newly set pressure. Note) Those indicated in parentheses are for the air operated type. Material luminum alloy die-casted luminum alloy die-casted luminum alloy Stainless steel luminum alloy NR Stainless steel luminum alloy Part no. V- 7 RJ R5 to 95 RX MR RM RP IR - IR IRV VEX SRH SRP SRF ITV IC ITVH ITVX PVQ VY V VT P

9 VEX Series ody Ported VEX-, section view x M thread depth 6.5 (For bracket and foot mounting) x ø.5 (Mounting hole) x, Note) 76 Foot (Option) Note) racket (Option) x ø.5 (Mounting hole) Note) ( ) are the dimensions of. VEX -, section view x M thread depth 6.5 (For bracket and foot mounting) Foot (Option) x ø.5 (Mounting hole) ir operated type.5 racket E (Option) x x ø.5 (Mounting hole)

10 Power Valve/Precision Regulator VEX Series ody Ported VEX -,, VEX5 -, 6, racket (Option) racket (Option).5 x thread depth (For bracket mounting) ir operated type ir operated type RJ R5 to 95 RX MR RM RP IR - IR IRV VEX SRH SRP SRF ITV IC ITVH ITVX PVQ VY V VT P x M6 thread depth 9 (For bracket mounting) (Mounting hole) 9

11 VEX Series ody Ported VEX7 -, racket (Option) ir operated type (Mounting hole) x M6 thread depth 6 (For bracket mounting) VEX9 -, racket (Option) x M6 thread depth (For bracket mounting) ir operated type (Mounting hole) 5

12 Power Valve/Precision Regulator VEX Series ase Mounted VEX-, VEX -, (Mounting hole) (Mounting hole) ir operated type RJ R5 to 95 RX MR RM RP IR - IR IRV VEX SRH SRP SRF ITV IC ITVH ITVX PVQ VY V VT P 5

13 VEX Series Manifold: VVEX- - - pplicable valve: VEX Valve mounting side Pilot port lanking plate VEX-5 Port ().5 P PE P PE P PE P PE P PE x ø5.5 Mounting hole P=.5 L L 6.5 ø6 G7--R-X7 (79) 6.5 Port (R): For 6 manifold stations or more, exhaust from the both sides. 9 9 R P External pilot port Without thread: Internal pilot VVEX- With thread: Common external pilot VVEX- P 6 P= 5 n x port (): Port (P): For 6 manifold stations or more, exhaust from the both sides. L Dimension n Symbol L 7 L L = n + 5, L = n + n: Station

14 Power Valve/Precision Regulator VEX Series Manifold: VVEX- - - pplicable valve: VEX Valve mounting side Pilot port Pilot port lanking plate Mounting hole Port () Internal pilot VVEX- Port () Common external pilot VVEX- Port (P): For 5 manifold stations or more, exhaust from the both sides. External pilot port Without thread: Internal pilot VVEX- With thread: Common external pilot VVEX- RJ R5 to 95 RX MR RM RP IR - IR IRV VEX SRH SRP SRF ITV IC ITVH ITVX PVQ VY V VT P n x port (): Port (R): For 5 manifold stations or more, exhaust from the both sides. L Dimension n Symbol L 9 L 76 7 L = n + 9, L = n + n: Station

15 VEX Series Precautions e sure to read this before handling the products. Refer to back page 5 for Safety Instructions and pages 7 to 9 for Precautions on every series. Operating Fluid Caution. If drainage or debris is present in the supply pressure line, the fixed orifice becomes clogged, resulting in a malfunction. Therefore, in addition to the air filter (SMC s F series), make sure to use a mist separator (SMC s M, F M s e r i e s ). Concerning the quality of the operating air, refer to SMC s the air preparation equipment selection guide (pages and ).. Make sure to perform a maintenance periodically on air filter and mist separator (by discharging the drain and cleaning a filter element or replacing with new one).. Never use a lubricator on the supply side with the internal pilot remaining in place, doing so will cause the fixed orifice to become clogged, invariably leading to a malfunction.. When lubrication to terminal device is required: Connect a lubricator on the supply [port (P)] side using the external pilot type. Use mist separator passage on the pilot air [port P] side. 5. Use a supply pressure in the recommended range (the range indicated in the diagram below). VEX, VEX Supply pressure (MPa) Supply pressure (MPa) Supply pressure range Set pressure (MPa) VEX, VEX, VEX VEX5, VEX7, VEX9 Supply pressure range Set pressure (MPa) Piping Warning. Use the flow rate characteristics on page 6 as reference to select a regulator size so that the required flow rates on the reduced pressure supply and relief exhaust sides have sufficient allowances. If the reduced pressure supply and relief exhaust that may cause extreme changes in flow rate are repeated (main valve is fully opened and closed repeatedly), the nozzle flapper is deformed. This may cause the pressure set value to deviate or the diaphragm to break early. So, do not use under such conditions. Caution. Tightening the fittings and their torque When screwing fittings into the valve, make sure to tighten them to the proper torque values given below. Connection thread: First, tighten by hand, then use a wrench appropriate for the hexagon flats of the body to tighten an additional /6 to / turn. reference value for the tightening torque is to.5 N m. Use the fitting with sealant as the Uni One-touch fitting cannot be used. For the fitting with sealant R or NPT, first, tighten it by hand, then use a wrench appropriate for the hexagon flats of the body to tighten it a further two or three turns. For a tightening torque guide, refer to the table below. Connection thread size (R, NPT) Proper tightening torque (N m) to 5 to 5 to to 5 to 6 to to to 5 to 5. Ordinarily, air is discharged from the bleed port (PE). The consumption of air through this discharge is normal, owing to the construction of the precision pressure regulator. Regulator for Signals (ir operated type only) Caution pplicable model Regulator IR series VEX series In the case of multiple pressure control, consider using ITV series or the E-P HYREG VY series, which can simplify your system. Zero djustment Screw Caution The zero adjustment screw has been adjusted at the time of shipment to set the signal pressure and the output pressure as close to : as possible. Thus, it is not necessary to adjust it for operational purposes. Vibration Caution Vibration is likely to occur under the following conditions.. Supply pressure is relatively high (approx..5 MPa or higher), set pressure is low (approx.. MPa or lower) and the outlet side is open to the atmosphere.. Capacity of the precision regulator outlet side is extremely small. The following measures can be taken. a. Set the supply pressure extremely low (+. MPa or more of the set pressure). b. Make the capacity of the precision regulator outlet side larger. c.install an exhaust throttle valve with a silencer (SN-) on the bleed port (PE). Vibration can be avoided by adjusting the exhaust throttle. However, if the bleed is throttled too much, sensitivity may be reduced, resulting in poor performance. e sure not to apply excessive throttle. Related Products: Silencer (N series) Noise reduction capability of over d. Provides a sufficient effective area. For details, refer to est Pneumatics No. 7. Exhaust cleaner (MC series) Provides noise reduction and oil mist recovery functions. Can also be used in an intensive piping system. Oil mist removal of 99.9% Noise reduction of over 5 d. For details, refer to est Pneumatics No. 7. 5