Air Saving Valve Series Series Pressure Valve Flow Valve % reduction in air consumption Cuts air consumption by operating the return stroke at a reduced pressure. valve Pressure Air consumption reduction ratio (%) 3 2.3.1.1.2.2.3 pressure (MPa) valve Flow.9.7. pressure (MPa) AS ASP ASN AQ ASV AK VCHC ASS KE TMH Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com 81
Cuts air consumption by operating the return stroke at a reduced pressure. Conventional valve Working and return strokes operated at the same pressure Air saving valve operated at a reduced pressure Pressure valve Flow valve Regulator with check valve + Speed controller Quick supply and exhaust valve + Speed controller (Meter-in, Meter-out) Series Series 82 Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com
Smooth operation of working and return strokes possible. Consistent speed control achieved by preventing jerky movement of working strokes. Improved response time Operation delay in a return stroke is reduced by the use of a uick supply and exhaust valve. Delay in return operation 1. Cylinder operation by conventional 2 pressure control Cylinder operation by air saving valve Cylinder operation by speed controller pressure.1mpa Easy piping The body and one-touch fitting allow 3 rotation. The sealant on the male thread is standardized. Body Delay time (sec) Other applications Jerk prevention in vertical operation of the cylinder Balancing pressure 1.2 1..8...2. Speed controller 3 8 One-touch fittings Cylinder bore size (mm) Cylinder speed: 2 mm/sec Cylinder stroke: 2 mm Quick air charge at the end of stroke for press applications Speed controller.2mpa.3mpa.1mpa.2mpa.3mpa.mpa The set pressure can be either fixed or variable. Fixed set pressure type (Fixed at.2 MPa) Series Variations 3F-2 3F-2 3F-3 3F-3 3F- Model Cylinder operating pressure (MPa)..3..2.1 Variable set pressure type (Variable between.1 and.3 MPa) 3F-2 3F-2 3F-3 3F-3 3F- Quick supply and exhaust valve Air consumption reduction ratio (%) 17 2 33 Graduated knob Port Applicable tubing O.D. (mm) size 8 R1/ R1/ R3/8 R3/8 R1/2 2 3 A knob cap is attached to the variable set pressure type. AS ASP ASN AQ ASV AK VCHC ASS KE TMH Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com 83
8 Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com
Air Saving Valve Pressure Valve Flow Valve Series /Series : Series How to Order 3 F 2 S F2 Regulator with check valve and flow control valve integrated into a single construction : Series Pilot valve and two-way flow control valve integrated into a single construction Model Body size 1/ standard 3/8 standard 1/2 standard Type 3 Universal Model With One-touch fitting 3F-2 3F-2 3F-3 3F-3 3F- Model Specifications 3F-2 3F-2 3F-3 3F-3 3F- Port size 2 R1/ 3 R3/8 R1/2 Port size R1/ R1/ R3/8 R3/8 R1/2 Nil F2 With seal Option Variable set pressure type (.1 to.3 MPa) Fixed set pressure type (.2 MPa) Applicable tubing O.D. mm 8 8 mm mm mm Nil J Lock nut option Hexagon lock nut Round lock nut Applicable tubing O.D. (mm) 8 AS ASP ASN AQ ASV AK VCHC ASS KE TMH Fluid Proof pressure Maximum operating pressure Set pressure Variable range Fixed (option) Ambient and fluid temperature Applicable tubing material Air 1. MPa 1. MPa.1 to.3 MPa.2 MPa to C (with no freezing) rotations Nylon, Soft nylon, Polyurethane Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com 8
Series /Series Effective Area Pressure Valve: Series Type 3F-2-S(-F2) 3F-2-8S(-F2) 3F-2-S(-F2) 3F-2-S(-F2) 3F-2-8S(-F2) 3F-2-S(-F2) 3F-2-S(-F2) 3F-3-S(-F2) 3F-3-8S(-F2) 3F-3-S(-F2) 3F-3-S(-F2) 3F-3-S(-F2) 3F-3-S(-F2) 3F--S(-F2) 3F--S(-F2) Free flow mm 2..9.9 7.3 8.9 9.2 9. 7.3 8.9 9.2 9. 1.3 1. 1.3 1. Controlled flow mm 2.9.7.7 8.1 11.8 13.3 13.7 8.1 11.8 13.3 13.7 17.8 19.1 17.8 19.1 Flow Valve: Series Type 3F-2-S(-F2) 3F-2-8S(-F2) 3F-2-S(-F2) 3F-2-S(-F2) 3F-2-8S(-F2) 3F-2-S(-F2) 3F-2-S(-F2) 3F-3-S(-F2) 3F-3-8S(-F2) 3F-3-S(-F2) 3F-3-S(-F2) 3F-3-S(-F2) 3F-3-S(-F2) 3F--S(-F2) 3F--S(-F2) Meter-out mm 2.1... 9.2 9.8.8. 9.2 9.8.8 1.3 1.2 1.3 1.2 Meter-in mm 2.9.. 7.8.1.8 11. 7.8.1.8 11. 17.1 18. 17.1 18. Operating Principle Working Stroke Return Stroke Pressure, Stroke PH Cylinder movement PR A B C PH PR Pressure, Stroke D PR Cylinder movement by flow valve F Cylinder movement by speed control valve PH PR E PH Time 1. The cylinder starts smoothly because jerks are prevented by meter-in control. Jerk prevention Time 3. To prevent delay due to the pressure gap, air is rapidly exhausted to decrease the pressure from D to E, after which the piston moves at a constant speed. If a speed controller is used instead of the flow valve, exhausting air will take more time as illustrated by line D-F, resulting in longer stop time of the cylinder and a conseuent time loss. Quick exhaust 2. When the cylinder reaches the stroke end, the uick air charge by the flow valve rapidly increases the rear side pressure (PH) from A to B. If a speed controller is used instead of the flow valve, charging air will take more time as illustrated by line A- C, causing delay in the pressure rise. Quick supply. The cylinder operates at a low pressure reuired for a return. Low pressure operation 8 Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com
Air Saving Valve Pressure Valve Series / Flow Valve Series Flow Characteristics Pressure Valve: Series (Inlet pressure:. MPa) 3F 3F 3F 3 2 8, 2 8 8 2 1 Flow Valve: Series Meter-out Type (Inlet pressure:.3 MPa) 3F 2 3F 3 2 Meter-in Type (Inlet Pressure:. MPa) 3F, 3F. 8, 8, 2 2 Pressure Characteristics () Set pressure.3 MPa 3F 3 2 3F 8 8 8 3F. 3F 3F Set pressure.3 MPa 2 1 2 1 AS ASP ASN AQ ASV AK VCHC ASS KE TMH P2: Outlet pressure.3.2.1 Set pressure.2 MPa Set pressure.1 MPa P2: Outlet pressure.3.2.1 Set pressure.2 MPa Set pressure.1 MPa.1.2.3....7.8.1.2.3....7.8 P1: Inlet pressure P1: Inlet pressure Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com 87
Series /Series Selection and Adjustment Install a flow valve on the working side which reuires the cylinder output and a pressure valve on the return side. The product cannot be used in cases where the same pressure is necessary for both working and return strokes. In such cases use a speed controller. Horizontal mounting Low pressure side: High pressure side: Low pressure side Series High pressure side Series Refer to Adjustment Procedure 1 for pressure and speed adjustment. Vertical mounting Low pressure side: High pressure side: Series Low pressure side Series High pressure side In case the load ratio is % or lower at the set pressure of the flow valve: Refer to Adjustment Procedure 1 for pressure and speed adjustment. If the load ratio at the set pressure of the flow valve exceeds %, install a dual speed controller (meter-in and meter out control) on the high pressure side. Low pressure side: High pressure side: Dual speed controller Series Low pressure side Dual speed controller (Meter-in and Meter-out) Series High pressure side ASD Refer to Adjustment Procedure 2 for pressure and speed adjustment. 88 Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com
2 Air Saving Valve Pressure Valve Series / Flow Valve Series Adjustment Procedure 1 Pressure Adjustment 1. The fixed set pressure type (-F2) does not reuire adjustment because the pressure is fixed at.2 MPa for both the pressure valve and the flow valve. 2. The set pressures of the variable set pressure type pressure valve and flow valve are adjusted with knob A and knob B respectively. Turn the knob clockwise to increase the pressure and counterclockwise to decrease the pressure. 3. The graduations 1, 2 and 3 correspond to.1,.2 and.3 MPa respectively. Align the bottom end of the knob with the graduated line for adjustment. 3 Align the bottom end of the knob with the graduated line. The figure illustrates the case in which the pressure is set at.2 MPa.. Set the same pressure for the pressure valve and the flow valve (.2 MPa as the recommended value).. The inlet side should be supplied with a pressure which is higher than the set pressure by.1 MPa or more.. Cap the valve after adjustment. Speed Control 1. The cylinder speed is adjusted with knobs C, D and E. First have all the knobs fully closed and then open them gradually for adjustment. Turn the knob clockwise to close (decrease the speed of the piston rod) and counterclockwise to open (increase the speed of the piston rod). 2. Speed adjustment for the working stroke The speed is adjusted with the pressure valve and the flow valve. Open knobs C and E gradually until the reuired speed is achieved. Make sure that knobs C and E are opened by the same number of rotations. Note 1) If the piston rod jerks, close knob E until the smooth operation is achieved. 3. Speed adjustment for return stroke The speed is adjusted with the flow valve. Open knob D gradually until the reuired speed is achieved.. Be sure to tighten the lock nut after adjustment. Adjustment Procedure 2 Pressure Adjustment Pressure Valve: Series C 1. The fixed set pressure type (-F2) does not reuire adjustment because the pressure is fixed at.2 MPa. 2. The pressure at the low pressure side (return stroke side) is adjusted by the pressure valve. 3. The set pressure is adjusted with knob A. Turn the knob clockwise to increase the pressure and counterclockwise to decrease the pressure.. The graduations 1, 2 and 3 correspond to.1,.2 and.3 MPa respectively. Align the bottom end of the knob with the graduated line for adjustment.. Keep the set pressure as low as possible in order to achieve good air saving effect.. Cap the valve after adjustment. Pressure Valve: Series C A A Flow Valve: Series D Speed Control 1. The cylinder speed is adjusted with knobs C, F and G. First have all the knobs fully closed and then open them gradually for adjustment. Turn the knob clockwise to close (decrease the speed of the pistoin rod) and counterclockwise to open (increase the speed of the piston rod). 2. Speed adjustment for the working stroke The speed is adjusted with the pressure valve and the dual speed controller. Open knobs C and G gradually until the reuired speed is achieved. Make sure that knobs C and G are opened by the same number of rotations. Note 1) If the piston rod jerks, close knob G until the smooth operation is achieved. 3. Speed adjustment for return stroke The speed is adjusted with the dual speed controller. Open knob F gradually until the reuired speed is achieved.. Be sure to tighten the lock nut after adjustment. Dual Speed Controller: Series ASD F B E G AS ASP ASN AQ ASV AK VCHC ASS KE TMH Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com 89
Series /Series Construction Pressure Valve: Series Variable type Fixed type 3F-2 type 3F-3 type 3F- type!8!9 w @ e! 3F-2 type 3F-3 type u o!3 3F- type u o!3!8!9 w @ i y!!1!2 e! i!! 3F-2 type 3F-3 type Component Parts No. 1 2 3 7 8 9 11 13!9 t @ r Description Body A Body B Seat ring Body B1 Body B2 Body C Stopper Valve Piston Adjustment screw Cap Adjustment spring 3F-2 type!8 u o!3 3F-3 type!8 u o!3!9 t @ r! i y!!1!2! i!! Material Stainless steel HNBR/ Polypropylene Steel wire Note Zinc chromated No. 1 1 1 17 18 19 2 21 22 23 2 2 Description U seal Body C Adjustment plug Needle Lock nut U seal Elbow body Spacer (1) Cassette Seal Drive body (2) Material HNBR Steel HNBR NBR Note 1) Not used for ø and ø8. Note 2) Not used for ø and ø. Note Zinc chromated 9 Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com
Air Saving Valve Pressure Valve Series / Flow Valve Series Flow Valve: Series Variable type Fixed type 3F-2 type 3F-3 type 3F- type!!8 w @ e 3F-2 type 3F-3 type!8! t @ r Component Parts No. 1 2 3 7 8 9 11 13 Description Body A Body B Seat ring Body B1 Body B2 Adjustment screw Cap Adjustment plug Body C Body D1 Body D2 Body D3 i 3F-2 type u 3F-3 type o 3F- type y!!!3!2!!!!1!1!8 w @ @1!!9 e! @1!!9! i u 3F-2 type 3F-3 type y! @1!!9!!2!8!!!1 t @ r @1!!9! Material Polypropylene Note No. 1 1 1 17 18 19 2 21 22 23 2 2 2 Description Piston valve Adjustment spring Needle Lock nut Lock nut U seal U seal Elbow body Spacer (1) Cassette Seal Drive body (2) Note 1) Not used for ø and ø8. Note 2) Not used for ø and ø. Material HNBR/ Steel wire Steel Steel HNBR HNBR NBR Note y!!3!!1 Zinc chromated Zinc chromated Black zinc chromated AS ASP ASN AQ ASV AK VCHC ASS KE TMH Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com 91
Series /Series Dimensions Pressure Valve: Series Variable set pressure type Fixed set pressure type (-F2) L1 L1 L2 d L2 d M M L ød1 ød1 ød2 ød2 L L3 L H (Width across flats) H (Width across flats) A2 L A1 A2 L A1 ød3 ød3 T T Model d (1) T H D1 D2 D3 L1 L2 L3 (2) L (3) L () L A2 () M Max. Min. Max. Min. 1 2 3F-2-S,-F2 3F-2-8S,-F2 3F-2-S,-F2 3F-2-S,-F2 8 R1/ 17 18. 2 21. 7.7 8.7 3.8 2.9 3.9 3.9 31 3. 3.7... 23. 39. 1.8 17 18. 21 17 111 11 1 89 93 82 7 3F-2-8S,-F2 8 18. 3.9 37. 18. 13 13 R1/ 21 2.3 2.3 7.3 9.2.8.8 2.9 9.8.8 18.8 3F-2-S,-F2 9 32. 21 13 3F-2-S,-F2 3F-3-S,-F2 2.9.8 2.9 3. 3. 22 17 1 1 2 137 3F-3-8S,-F2 8 18. 3.9 37. 18. 13 1 R3/8 21 2.3 2.3 7.3 9.2 7. 2. 2.9 1 2 3F-3-S,-F2 9 32. 21 13 13 3F-3-S,-F2 2.9.8 3. 22 1 133 3F-3-S,-F2 18. 2.8 32. 21 237 219 R3/8 2 29.7 3 8.3. 7..1 27.7 1.2 3.7 2. 3F-3-S,-F2 2.9. 3. 22 239 221 3F--S,-F2 18. 2.8 32. 21 27 239 R1/2 2 29.7 3 8.3. 71.1 3. 27.7 2.9. 2.1 3F--S,-F2 2.9. 3. 22 29 239 Note 1) d indicates the applicable tubing O.D. Note 2) L3 is the dimension for the variable set pressure type. Note 3) L is the dimension for the fixed set pressure type. Note ) Reference dimensions Note ) A1 and A2 are reference dimensions after installation. Note ) 1 is the weight for the variable set pressure type and 2 is that for the fixed set pressure type. 92 Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com
Air Saving Valve Pressure Valve Series / Flow Valve Series Flow Valve: Series Variable set pressure type Fixed set pressure type L1 L1 L2 d L2 d M M ød2 L8 ød2 L8 L3 L3 L L L L7 A1 A2 Model 3F-2-S,-F2 3F-2-8S,-F2 3F-2-S,-F2 3F-2-S,-F2 3F-2-8S,-F2 3F-2-S,-F2 3F-2-S,-F2 3F-3-S,-F2 3F-3-8S,-F2 3F-3-S,-F2 3F-3-S,-F2 3F-3-S,-F2 3F-3-S,-F2 3F--S,-F2 3F--S,-F2 H (Width across flats) T ød ød1 ød3 d (1) T H D1 D2 D3 D L1 L2 L3 L (2) L7 (2) A1 L (3) L () L8 A2 () Mass (g) M Max. Min. Max. Min. Max. Min. 1 2 1. 3.9 17 13 11 8 R1/ 17 18. 2 21. 19. 2. 3.9 2.3 9.. 88.8 8.7.. 23. 39. 17.9 18. 139 117 7.7 31 21 13 8. 3. 17 178 1 8 18.. 37. 18. 181 18 R1/ 21 2.3 2.8 2. 23. 3. 8. 92.2 72.8.8 2. 9.8.8 19 1.7 32. 21 172 19 2.9 3. 3. 22 17 11. 3. 17 188 1 8 18.. 37. 18. 191 18 R3/8 21 2.3 2.8 2. 23. 3. 8. 93.8 73. 7. 2. 2. 1 2.2 1.7 32. 21 182 19 2.9 3. 3. 22 18 11 18. 7.8 32. 21 3 292 R3/8 2 29.7 3.7 3 3.8 7.3.8 7.9 8.9 7..1 28 1.2 3.7 2.8 2.9 7. 3. 22 3 29 18. 7.8 32. 21 33 3 R1/2 2 29.7 3.7 3 3.8 7.3.8 111. 9. 71.1 3. 28 2.9. 2.1 2.9 7. 3. 22 332 31 Note 1) d indicates the applicable tubing O.D.. Note 2) Reference dimensions Note 3) L is the dimension for the variable set pressure type. Note ) L is the dimension for the fixed set pressure type. Note ) A1 and A2 are reference dimensions after installation. Note ) 1 is the weight for the variable set pressure type and 2 is that for the fixed set pressure type. L L7 A1 A2 H (Width across flats) Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com T ød ød1 ød3 93 AS ASP ASN AQ ASV AK VCHC ASS KE TMH
Series / Specific Product Precautions Be sure to read before handling. Refer to front matters 8 and 9 for Safety Instructions and pages to 1 for Flow Control Euipment Precautions. Selection Warning 1. Keep the set pressure range of the outlet pressure of the pressure valve within 8% that of the inlet pressure. If the value exceeds 8%, the outlet pressure may become unstable, affected by the fluctuation of the inlet pressure. Installation Warning 1. The number of opening and closing rotations of the needle valve and adjustment screw should be adjusted within the range of the specifications. Since it has a pull-out stop mechanism, it will not rotate past the limit. Confirm the number of rotations for the product being used, as excessive turning of the needle will cause damage. 2. The valve cannot be used if there are load fluctuations. The piston rod may jerk during operation. 3. In case a closed-center solenoid valve is used, switch to the center position only after pressure charge inside the cylinder at the stroke end is completed. If the pressure charge is insufficient, the piston rod may jerk after restart.. When the valve is used for an actuator operating vertically, the actuator may lurch depending on the load. For the adjustment method, please refer to page 89. Operating Caution 1 The valve cannot be used if the same pressure is reuired for both the working and return strokes. The pressure valve and flow valve are designed to save air by the difference in the operating pressure. 2 Install a flow valve on the working side which reuires the cylinder output and a pressure valve on the return side. The cylinder may not operate if the valves are installed on the wrong sides. Pressure Valve Series Flow Valve Series 3 If a closed-center, exhaust-center, pressure-center or perfect solenoid valve is used and the solenoid valve is set at the center position, the cylinder may move to the position where the pressure balance and load balance are achieved. 9 Courtesy of Steven Engineering, Inc.-23 Ryan Way, South San Francisco, CA 98-37-Main Office: () 88-92-Outside Local Area: (8) 28-92-www.stevenengineering.com