Power Valve: Precision Regulator. High precision, large capacity relief regulator

Transcription

1 Power Valve: Precision Regulator Series VEX 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 styles. 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. Manifold capable VVEXB/Rc / Up to stations VVEX/Rc / Up to stations Minimum size VEX B Non-grease Seal materials (NBR, FKM) only for VEX B High precision This regulator is well-suited for balancer applications because it minimizes pressure fluctuations with its largevolume supply/exhaust capability, in addition it features high precision F.S. (full span) sensitivity within.% and F.S. repeatability of ±.5%. Rich line-up Port sizes available from M5 to Rc, most flow rates and pipes can be accommodated. Minimum size F.R.L. V U F R IR VEX MR ITV IC VB VE VY PP L Manual handle type -6-

2 Series VEX pplication Example Relief Type Regulator Rapid tank internal pressure adjustment and precise pressure setting ccurate Pressure Setting Sensitivity within.% F.S. (Full span) Tension control Precision regulator Large effective areas of both supply and exhaust sides make it possible to set internal tank pressure rapidly. Contact Pressure Control Balance and Drive ccurate balance pressure setting Drive roller Winding roller Low friction type Manual handle type Pressure changes during cylinder actuation are suppressed, balancing the cylinder in both static and dynamic conditions. Load Balance (With superior repeatability) Within ±.5% F.S. (Full span) Manifold ccurate balance pressure setting and superior repeatability prevent actuating play in the cylinder, and make the stop precision steady. Manifold can be mounted to VEXB, VEX. -6-

3 Precision Regulator Series VEX Specifications Operation Pilot Model Fluid Proof pressure Supply pressure Setting pressure range mbient temperature () Fluid temperature () Repeatability Sensitivity ir consumption () Mounting Linearity () Signal pressure () Signal port P () Port size Rc Weight (kg) Port P R VEX- M5 VEXB- M5 VEX - VEX - VEX - VEX5-6 VEX7 - VEX9 - Manual (Push locking slotted type) Manual handle (Push locking slotted type) and Internal pilot External pilot can be switched. Refer to How to Switch to External Pilot on page -6-. Refer to pplicable Fluids. ir.5 MPa (Set pressure +. MPa) to Max. MPa Caution Refer to Precautions.. to.7 MPa.5 to.7 MPa to 6 C to 6 C (VEX B) to 99 C (VEX BB) to 6 C Within ±.5% F.S. (Full span) Within.% F.S. (Full span) 6 l/min (NR) (at supply pressure.9 MPa) Free Within ±% F.S. (Full span).5 to.7 MPa Rc M5 M5 6 () () M5 M5.5. (5).. (5).5. pplicable Fluids Model Fluid VEX B (Valve construction: NBR seals) ir (Normal, Dry) Carbon dioxide (.7 MPa) Nitrogen gas (N) Freon,, Note ) No condensation. Note ) Large amount of air is exhausted all the time. Note ) pplicable only to air operated type. Note ) Indicates mm and Cv of ( P Supply side / Exhaust R side ). Note 5) With sub-plate. VEX B B (Valve construction: FPM seals) rgon Helium High temp. air (Max. 99 C) F.R.L. V U F R IR VEX MR ITV IC VB VE VY PP L JIS Symbol Manual handle type -6-

4 Series VEX VEX Regulator valve Type Precision regulator Body size Body size Body ported Base mounted Operation Manual handle B Port size Port M5 Nil M5 B VEX 5 How to Order M5 Valve seal Nil NBR seals B FKM seals Refer to pplicable Fluids Port size P,, R port M5 Without sub-plate M5 Option B F N Threads (/ only) Nil F N T Rc NPT NPTF Bracket Foot Pressure gauge Silencer for bleed hole 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 orifice from port P.. Install the orifice facing in the opposite direction (external pilot). Install it carefully to prevent damage to the O-ring.. Tighten the orifice again and connect the pilot piping to port P using an M5 fitting. Position for P Regulator valve Type Precision regulator Operation Body size Body size Body ported Base mounted Option Port 6 Nil Manual handle Port size Port size P, port R port Description Bracket (With bolt and washer) Foot (With bolt and washer) Pressure gauge Silencer for breed port (PE) -6- Without sub-plate B F N Option B F N Thread type Nil F N T Rc NPT NPTF Bracket Foot Pressure gauge Silencer for bleed hole Part no. VEX VEXB VEX VEX VEX VEX5 VEX7 VEX9 VEX-- VEX-- VEX- VEX5- VEX7- VEX9- VEX-- VEX-- 7--R-X N-M5 Dimensions of P port <Internal pilot> Orifice <External pilot> P port Fittings for M5 6-- The optional parts are shipped in the same package. 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. For details, refer to the pressure gauge guide on page --. Example: VEX- 6--

5 Series VEX Flow Characteristics P port pressure: MPa VEX, VEXB- VEX, VEX - VEX - (Relief exhaust) Flow (Pressure reducing supply) (Relief exhaust) Flow (Pressure reducing supply) (Relief exhaust) Flow (Pressure reducing supply) VEX5-6 VEX7 - VEX9 - (Relief exhaust) Flow (Pressure reducing supply) (Relief exhaust) Flow (Pressure reducing supply) (Relief exhaust) Flow (Pressure reducing supply) Pressure Characteristics P port pressure:.7 MPa, port pressure:. MPa, Flow: l/min (NR) VEX, VEXB VEX, VEX VEX VEX5 VEX7 VEX9-6-6

6 Precision Regulator Series VEX Construction/Working Principle VEX, VEXB VEX, VEX, VEX, VEX5 VEX7, VEX9 Retainer Lower diaphragm Body Component Parts Main valve part Spring Valve When set-handle 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 (atmosphere). If set handle o is turned conterclockwise, the movement will be the opposite, the outlet pressure will decrease, and will balance with a newly set pressure. Diaphragm Upper diaphragm Nozzle Fixed orifice No. Description Material q w e r t y u i Body Upper diaphragm Spring Valve Retainer Lower diaphragm Zinc alloy die-casted luminum alloy die-casted NBR/FKM Stainless steel Stainless steel NBR/FKM Polyacetal NBR/FKM Flapper djustment spring Handle Main valve part Flapper Nozzle Diaphragm Piston Shaft Body Poppet valve (ir supply) Spring Zero adjusting screw Diaphragm Flapper Nozzle Diaphragm P() port pressure Component Parts Manual handle type Feedback pressure No. Description Material q w e r t y u i Body Regulating piston Spring Poppet valve Shaft luminum alloy die-casted luminum alloy die-casted luminum alloy Stainless steel luminum alloy NBR Stainless steel luminum alloy Handle djustment spring Fixed orifice Spring Poppet valve (ir exhaust) Signal port When set-handle o is turned clockwise, the force generated by set spring! (via diaphragm!5, as the set pressure of the pressurereducing valve that is connected to the signal port is increased) 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 secondary 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-handle 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 secondary pressure will decrease and balance with a newly set pressure. Note) Those indicated in parentheses are for the air operated type F.R.L. V U F R IR VEX MR ITV IC VB VE VY PP L

7 Series VEX Body Ported VEX-M5, -M x.5 (Mounting thread) -ø.5 section view -Rc, M5 Note) Foot (Option) Note) Bracket (Option) Note) ( ) are the dimensions of M5. VEX -, Foot (Option) -M x.5 (Mounting thread) -ø.5 section view -M5 x. Bracket E (Option), -ø.5-6-

8 Precision Regulator Series VEX Body Ported VEX -,, -M5 x. Bracket VEX- (Option) VEX5 -, 6, /, /, / -M5 x. (Mounting thread) F.R.L. V U F R IR VEX MR ITV IC VB VE VY PP L Bracket VEX5- (Option) -M5 x. -M6 x (Mounting thread) /, /, -6-9

9 Series VEX Body Ported Bracket (Option) VEX7 -, -M5 x. Rc / -M6 x x 6 (Mounting thread) Rc / -Rc, / VEX9 -, Bracket (Option) -M5 x. Rc / Rc -Rc /, -M6 x x (Mounting thread) -6-

10 Precision Regulator Series VEX Base Mounted VEXB-M5, M5, Rc / VEX -, -M5 x. -M5, Rc -Rc /, / F.R.L. V U F R IR VEX MR ITV IC VB VE VY PP L -M5 x. Rc / -6-

11 Series VEX Precautions Be sure to read before handling. Refer to pages -- to -- for Safety Instructions and Common Precautions. Related Products: Silencer (Series N) Noise reduction capability of over db. Provides a sufficient effective area. Operating Fluid. If drainage or debris is present in the supply pressure line, the fixed throttle 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, FM series). Concerning the quality of the operating air, refer to SMC s Compressed ir Cleaning Systems on page --.. 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 throttle to become clogged, invariably leading to a malfunction.. If it is necessary to provide lubrication to a terminal device, connect a lubricator to the output side, when an internal pilot is used. If an external pilot is used, a lubricator can be connected to the supply side, provided that mist separator passage air is used on the pilot valve side. 5. Use a supply pressure in the recommended range (the range indicated in the diagram below). VEX, VEXB Supply pressure (MPa) Supply pressure (MPa) Caution Supply pressure range Set pressure (MPa) VEX, VEX, VEX VEX5, VEX7, VEX9 Supply pressure range Set pressure (MPa) Warning Piping. If a (solenoid or mechanical) directional switching valve is installed on the supply side of the precision regulator and the valve is turned ON-OFF repeatedly, it will increase the wear of the nozzle flapper, which could lead the set value to deviate. Therefore, avoid using a directional switching valve on the supply side. To install a directional switching valve, do so on the output side of the pressure-reducing valve. 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. Tightening Torque when Piping Connection thread pplicable torque (N. m) M5 x. pprox. 6 rotation after manual tightening Rc 7 to 9 Rc to Rc to Rc to Rc to Rc 6 to Rc to Rc to 5 Rc to 5. Ordinarily, air is discharged from the bleed hole (PE). The consumption of air through this discharge is normal, owing to the construction of the precision pressure reducing valve.. Under operating conditions in which the supply pressure is relatively high (approximately.5 MPa minimum) the set pressure is low (approximately. MPa maximum) and the output side is open to the atmosphere, pulsations could be created in the flow of the set pressure side. When this is the case, decrease the supply pressure as much as possible or slightly increase the set pressure and restrict the output line (such as by adding a throttle valve to adjust the pressure). Regulator for Signals ( only) Caution. pplicable model Regulator Series IR Series VEX B. In the case of multiple pressure control, consider using the E-P HYRE R Series VY, 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. Model N N N N N N5 N6 N7 N N9 Connection R Effective area (mm ) M5 x For details, refer to Best Pneumatics Vol. 5. Exhaust cleaner (Series MC) Provides noise reduction and oil mist recovery functions. Can also be used in an intensive piping system. Model MC MC5 MC6 MC MC9 Connection R Effective area (mm ) Max. flow (l/min (NR)),, 6,, Oil mist removal of 99.9% Noise reduction of over 5 db. For details, refer to Best Pneumatics Vol