Compact Proportional Solenoid Valve

Transcription

1 Compact Proportional Solenoid Valve Series Repeatability: % or less Hysteresis:1% or less Fluid Flow rate control range Note) Series Air, Inert gas to L/min to L/min Note) Varies depending on the model. 1 AR25 to 95 V Control the flow rate smoothly according to the current Max. flow rate Flow Rate Characteristics Flow rate curve with decreasing current Current decreasing Current increasing Hysteresis H X Repeatability Start-up current Flow rate curve with increasing current Control signal (ma) Rated current AP 975

2 Service life: Lasts 25 million cycles. () (SMC in-house life test conditions) Specially coated sliding surface realized 25 million cycles within set operating range Body material: Equivalent to C7 or Stainless Steel () Seal material: FKM (1, ) Valve returns to closed position when power supply is turned off. Leakage amount: 5 cm /min or less at OFF O-ring O-ring Can be used with vacuum. (Minimum operating pressure.1 Pa abs) Operation noise during opening/ closing of the valve reduced 1 ON db or less ON db or less OFF 2 db or less OFF 5 db or less Background noise: to 25 db Background noise: to 25 db Can be mounted on manifolds When continuously energizing adjacent valves at the same time, ambient temperature rises since the coil generates heat. Implement measures to exhaust excess heat so that the temperature remains within the range of the table on the right. Table: Coil outer surface temperature range Model Coil outer surface temperature 1 9 C or less C or less Ambient temperature: 5 C at the valve proximal section (approx. 1 mm) when the maximum current is applied Coil Core Spring Armature Working Principle The armature is attracted to the core by electromagnetic force as the coil is energized. When the applied current varies, the attraction force also varies proportionally to it. The flow rate is controlled by the movement (stroke) of the armature, depending on the balance between this attraction force and the spring load. Stroke Note) Sliding resistance at this point is the hysteresis of the flow. P (1) A (2) P (1) A (2) Proportional Solenoid Valve Flow rate can be controlled smoothly with one proportional solenoid valve by current control. Controller 1 P (1) A (2) Current (2 port valve) One 2-port valve is required for each flow rate. 2 port valve Smaller ma Greater Proportional solenoid valve 97

3 Applications Air-blow Blow-off of debris or water. Work transportation Spin control of handpiece Blood pressure gauge AR25 to 95 Vacuum chamber supply flow control Smooth air supply/exhaust is possible by reducing the initial air supply. Prevents dust being stirred up inside the chamber. V Supply Exhaust P Vacuum pump Model Piping type 1 Base mounted 1 Body ported Base mounted H X AP Bracket (Option) Valve construction Direct operated poppet Direct operated poppet Valve type N.C. N.C. Orifice size (mm) Max. operating pressure (MPa) to 5 to to 5 to to 75 Applied current (Power supply) to 85 ma (2 VDC) to 17 ma (12 VDC) to 15 ma (2 VDC) to ma (12 VDC) Port size M5 1/8 977

4 Series Model Selection <To use orifice ø1. (See : Chart 1)> Condition 1. P1 =.7 Mpa, P2 = MPa (Atmospheric pressure) Refer to curve A when P is.7 MPa. Ex) At increasing current, the flow rate when 1 ma current is applied is 85 L/min. (See q.) If current decreases at this point, the flow rate may not change by 15 ma due to hysteresis. (See w.) The flow rate at increasing current and decreasing current are not the same due to hysteresis. (q 85 L/min., e 9 L/min.) Condition 2. P1 =.7 MPa, P2 =.2 MPa Refer to curve B when P is.5 MPa. Ex) At increasing current, the flow rate when 15 ma current is applied is 5 L/min. (See r.) If the outlet pressure P2 increases by.15 MPa, P decreases by.15 MPa and becomes.5 MPa (See curve C), and the flow rate when the same current is applied is L/min. (See t.) The flow rate decreases due to change (increase) in outlet pressure, even if the inlet pressure and current value are the same. Condition. In a vacuum P = (P1 P2) MPa P : Pressure differential P1 : Inlet pressure P2 : Outlet pressure For vacuum specifications, the operating pressure range is from.1 Pa abs to max. operating pressure differential. A(2) port is applicable with vacuum pressure. <Chart 1> (ø1.) Current decreasing Curve A P =.7 MPa Curve B P =.5 MPa Current increasing Curve C P =.5 MPa Curve D P =.2 MPa

5 Model Selection Series Q. Required flow rate = to 75 L/min. P1 = No conditions, P2 = MPa (Atmospheric pressure) In this case, all orifice sizes of series satisfy the required flow rate. (Flow rate when rated current is applied) The table below shows the pressure differentials to satisfy the required flow rate. In the flow rate characteristics charts, a pressure differential over the flow rate indicated by the dashed line (75 L/min.) up to the max. operating pressure differential will satisfy the required flow rate. Table. Pressure differential to satisfy required flow rate = to 75 L/min. Pressure differential ( P) (ø1.) (ø2.) (ø.) P =.5 MPa P =.25 MPa P =.18 MPa P =.1 MPa P =.7 MPa P =.5 MPa P =.5 MPa P =.2 MPa 1 1 ø1..5 to.7 MPa P =. MPa P =. MPa 2 2 P =.12 MPa P =.8 MPa ø2..25 to.5 MPa 1 1 ø..12 MPa P = (P1 P2) MPa P : Pressure differential P1 : Inlet pressure P2 : Outlet pressure AR25 to 95 V H X AP Note 1) Follow the same procedure for selecting 1 series. 2) Flow rate depends on individual differences between valves and piping conditions. Refer to flow rate characteristics chart to select the model with adequate margin for required flow rate. 979

6 Compact Proportional Solenoid Valve 1 Series How to Order Base mounted Symbol 1 5 L M5 L Valve type 1 N.C. L plug connector Voltage 5 2 VDC 12 VDC Electrical entry A Port size Nil M5 Body/Seal material Symbol Body Seal A C FKM Without sub-plate (with mounting screw M1.7 x 17L, 2 pcs.) With sub-plate M5 x.8 Mounting screw Sub-plate M M plug connector Orifice size 1 (IN) 2 (OUT) With/Without lead wire Nil With lead wire O Without lead wire Symbol 8 Orifice dia.. mmø. mmø. mmø.8 mmø Max. operating pressure.7 MPa.5 MPa.2 MPa.1 MPa Specifications Standard specifications Coil specifications Valve construction Fluid Seal material Body material Fluid temperature Ambient temperature Note 1) Action Mounting orientation Port size Power supply Coil current Power consumption Coil insulation Direct operated poppet Air FKM C to +5 C to +5 C N.C. (Normally closed) Unrestricted M5 2 VDC 12 VDC to 85 ma to 17 ma to 2 W Class B Characteristic specifications Orifice diameter (mmø) Note 2) Max. operating pressure differential (MPa) Max. operating pressure (MPa) Min. operating pressure (MPa) (Vacuum) Note ) (at max. operating pressure differential) to 5 1 MPa (.1 Pa.abs) to to 5 Hysteresis (at max. operating pressure differential) Repeatability (at max. operating pressure differential) Start-up current (at max. operating pressure differential) 1% or less % or less 5% or less Note 1) Indicates the ambient temperature when the valve is not energized. When the valve is continuously energized (when applying maximum current) and the ambient temperature is kept at 5 C due to the convection of the air around the valve, the coil outer surface reaches approximately 9 C, and the coil proximal section (1 mm) reaches approximately C. Use the product at a temperature of not more than 5 C. Refer to the Specific Product Precautions Continuous Energization. Note 2) Maximum operating pressure differential indicates pressure differential (difference between inlet and outlet pressure) which can be allowed for operation with the valve closed or open. If the pressure differential exceeds the max. operating pressure differential of orifice, the valve may leak. Note ) For vacuum application, max. operating pressure range is.1 Pa abs to max. operating pressure differential. A(2) port is applicable for vacuum pressure. 9

7 Compact Proportional Solenoid Valve 1 Series Flow Rate Characteristics 1 (ø.) (ø.) P =.7 MPa P =.5 MPa P =.5 MPa P =.2 MPa 5 P =.2 MPa P =.15 MPa P =.1 MPa P =.5 MPa (ø.) (ø.8) Note) Flow rate varies depending on model differences and piping conditions. Select the model that fully satisfies the necessary flow rate based on the flow rate characteristics graphs. Construction 1 Component Parts P =.5 MPa P =.5 MPa P =.25 MPa P =.15 MPa 5 P =.1 MPa P =.8 MPa P =.5 MPa P =.2 MPa No. Description 1 Solenoid coil assembly 2 Core Return spring Armature assembly 5 Body O-ring Round head 7 combination screw 8 Sub-plate 5 Material Stainless steel Stainless steel Stainless steel, Aluminum, FKM C FKM Steel C Note M1.7 x.5 x 17L, 2 pcs. Part no: 1-15-M5 AR25 to 95 V H X AP P (1) A (2) P (1) A (2) (Shows with sub-plate) 981

8 Round head combination screw x ø x ø2.7 Mounting hole 1 (IN port).8 2 (OUT port) ø1. ø IN O-ring OUT O-ring 25. Interface M5 x.8 1 (IN port) M5 x.8 2 (OUT port) Sub-plate Round head combination screw C B A 1 Series Dimensions L plug connector 1- L- -M5 M plug connector 1- M- -M5 2 x ø2.7 2 x ø2.7 Mounting hole 1 (IN port) ø (OUT port) ø1..8 IN O-ring OUT O-ring Interface M5 x.8 M5 x.8 1 (IN port) 2 (OUT port) Sub-plate 982

9 Body ported 1 5 G 1 1 Base mounted 5 G 1 1 Specifications Standard specifications Coil specifications Symbol 1 (IN) 2 (OUT) Valve construction Fluid Seal material Body material Fluid temperature Note 1) Ambient temperature Action Mounting orientation Enclosure Port size Power supply Coil current Power consumption Coil insulation Compact Proportional Solenoid Valve Series Valve type N.C. Voltage 5 2 VDC 12 VDC Electrical entry: Grommet Symbol 1 2 Valve type Port size 1 N.C. 1 1/8 (A) Orifice size Orifice dia. Max. operating pressure 1. mmø.7 MPa 2. mmø.5 MPa mmø.12 MPa Direct operated poppet Air FKM C7 (Standard), Stainless steel to +5 C to +5 C N.C. (Normally closed) Unrestricted IP Rc 1/8 2 VDC 12 VDC to 15 ma to ma to W Class B Note 1) Indicates the ambient temperature when the valve is not energized. When the valve is continuously energized (when applying maximum current) and the ambient temperature is kept at 5 C due to the convection of the air around the valve, the coil outer surface reaches approximately C, and the coil proximal section (1 mm) reaches approximately 7 C. Use the product at a temperature of not more than 5 C. Refer to the Specific Product Precautions Continuous Energization. How to Order Characteristic specifications Port size Nil 1 Option Nil None F Foot bracket Bracket is not mounted but is provided at the time of shipment. Body/(Sub-plate) Seal material Symbol Body Seal Nil C7 FKM H Stainless steel Thread type (with sub-plate) Nil Rc F G N NPT T NPTF Without sub-plate (with mounting screw M x 8L, 2 pcs.) With sub-plate 1/8 (A) Orifice diameter (mmø) Max. operating pressure Note 2) differential (MPa) Max. operating pressure (MPa) Min. operating pressure (MPa) Note ) (Vacuum) (at max. operating pressure differential) Hysteresis (at max. operating pressure differential) Repeatability (at max. operating pressure differential) Start-up current (at max. operating pressure differential) 1..7 Mounting screw Sub-plate MPa (.1 Pa.abs) to 1% or less % or less..12 to 75 1% or less 5% or less 5% or less Note 2) Maximum operating pressure differential indicates pressure differential (difference between inlet and outlet pressure) which can be allowed for operation with the valve closed or open. If the pressure differential exceeds the max. operating pressure differential of orifice, the valve may leak. Note ) For vacuum application, max. operating pressure range is.1 Pa abs to max. operating pressure differential. A(2) port is applicable for vacuum pressure. 98 AR25 to 95 V H X AP

10 Series Flow Rate Characteristics Air (ø1.) (ø2.) P =.7 MPa P =.5 MPa P =.5 MPa P =.2 MPa P =.5 MPa P =.25 MPa P =.18 MPa P =.1 MPa (ø.) P =.12 MPa P =.8 MPa P =. MPa P =. MPa Note) Flow rate varies depending on model differences and piping conditions. Select the model that fully satisfies the necessary flow rate based on the flow rate characteristics graphs. Construction 98 P (1) A (2) Component Parts No Description Solenoid coil assembly Coil cover Magnetic plate Adjusting screw Tube assembly Return spring Armature assembly Body Nut Wave washer Material SPCE SUY Stainless steel Stainless steel Stainless steel Stainless steel, PPS, PTFE, FKM C7 or Stainless steel Steel Stainless steel 11 Round head combination screw Copper Sub-plate O-ring O-ring C or Stainless steel FKM FKM Option (Body ported only) Bracket assembly: VDW-15A-1 Sub-plate Part No Base mounted only Thread type Material C C S Stainless steel Note M x.5 x 8L, 2 pcs. Part no.: -15-1

11 Compact Proportional Solenoid Valve Series Dimensions x ø.5 27 AR25 to ø V 5 Rc 1/8 1 (IN port) 25 Rc 1/8 2 (OUT port) Bracket assembly 15 2 x ø. Base mounting hole 27 2 x M x.5 x 5 2 x ø. Mounting hole H X 2 Round head combination screw 2 (OUT port) ø1. OUT O-ring Interface (IN port) ø IN O-ring AP 11 ø.5 ø x ø ± x M x.5 22 ±.1 Rc 1/8 2 (OUT port) Rc 1/8 1 (IN port) Sub-plate Machining dimension of base side 985

12 Series Glossary Proportional control Control the fluid proportionally according to input signal (current). Max. operating pressure differential Indicates max. pressure differential (difference between inlet and outlet pressure) which is allowed for operation with the valve closed or open. Max. operating pressure This indicates the limit of pressure that can be applied to the inlet. (The pressure differential of the proportional valve must be no more than the maximum operating pressure differential.) Orifice diameter Diameter of the hole for sealing the valve body of the proportional valve. This does not indicate the effective cross section. Hysteresis Greatest flow rate difference between current increase and current decrease (with the same current). (Percentage divided by max. flow rate) Repeatability Deviation of output flow rate when the same current is applied. (Percentage divided by max. flow rate) Start-up current Current at which the flow rate is actually output while increasing current from zero. (Percentage divided by rated current) 98

13 Series Specific Product Precautions Be sure to read this before handling the products. Refer to back page 5 for Safety Instructions. Caution Power Source Selection This product makes proportional control possible with constant current. If controlled with voltage, the output flow rate cannot be kept constant due to current fluctuation. Use stable DC power source of sufficient capacity without much ripple. Caution Handling 1. This product is adjusted to the respective specifications at SMC factory before delivery. Do not disassemble the product or remove parts as it could cause breakdown of the product. 2. Flow rate is controlled by balancing the valve body. Do not expose the product to external vibration and impact as it changes the flow rate. Vibration may occur depending on the piping conditions or control methods. Caution Pressure Difference Leakage from the valve may be caused if the pressure difference is larger than the maximum operating pressure differential of the respective models. Caution Flow Rate Flow rate varies depending on model differences and piping conditions. Select the model that fully satisfies the necessary flow rate based on the flow rate characteristics graphs. Caution Operation in Vacuum When the product is used in vacuum, apply vacuum pressure to A (2) port. The pressure at P(1) port should be larger than the pressure at A(2) port. Caution Valve Mounting When mounting a valve to the sub-plate, tighten the screw securely with the tightening torque shown in the table below after checking the installation condition of the O-ring on the interface side. Proper Tightening Torque (N m) 1 (Base mounted) (Base mounted).15 to.22.8 to 1. Warning Continuous Energization 1. Ambient temperature and outer surface temperature When the valve is continuously energized (when applying maximum current) and the ambient temperature is kept at 5 C due to the convection of the air around the valve, the coil outer surface reaches approximately 9 C for the 1 series and C for the series. The valve proximal section (approx. 1 mm) reaches approximately C for the 1 series and 7 C for the series. When the valve is mounted inside the enclosed control panel (in a state without convection of air), however, the above temperature may be exceeded due to the rise in coil temperature or the influence of other equipment. Take measures to release the heat, for example, to create a convection of the air around the valve or provide an air vent. 2. Do not touch the valve directly with hands. The coil can be hot depending on the ambient temperature or energizing time. Install a protective cover over the valve if it can be touched directly with hands. AR25 to 95 V H X AP 987