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Summary of Contents for ASAHI Constant Flow Series
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Page 1: Table Of Contents
ASAHI AV VALVES Installation,Operation and Maintenance Manual H – V019 E – 2 Serial No. Constant Flow Valves User’s Manual Contents (1) General operating instructions (2) General care & storage instructions (3) Names of parts (4) Specifications (5) Principle & Operation... -
Page 2: General Operating Instructions
ASAHI AV VALVES Installation,Operation and Maintenance Manual (1) General operating instructions ○ Operate the valve within the pressure Vs temperature range. （The valve can be damaged by operating beyond the allowable range.） ○ Select a valve material that is compatible with the media, refer to “CHEMICAL RESISTANCE ON ASAHI AV VALVE”. -
Page 3: General Care & Storage Instructions
Installation,Operation and Maintenance Manual (2) General care & storage instructions ○ Since The Asahi AV constant flow valve has four types of A-D according to piping and fluid conditions, make sure of the product specifications after removing the valve from the packing case. -
Page 4: Specifications
ASAHI AV VALVES Installation,Operation and Maintenance Manual (4) Specifications ● Working Temperature : PVC = 0-50℃ (30 - 120°F), C-PVC = 0-70℃ (30 – 160°F) ● Upstream Working Pressure : 0.25MPa (2.6kgf / cm ) or less 0.25 to 0.5 MPa (2.6 to 5.1kgf / cm 0.5 to 0.75 MPa (5.1 to 7.7kgf / cm... -
Page 5: Principle & Operation
ASAHI AV VALVES Installation,Operation and Maintenance Manual (5) Principle & Operation Refer to Figure 1 for design and operation of ASAHI AV Flow Control Valve. When the upstream fluid pressure, P is introduced at the flow control orifice, it exerts a corresponding pressure on the upper surface of the flange on the piston type valve plug. -
Page 6: Installation Procedure
ASAHI AV VALVES Installation,Operation and Maintenance Manual (6) Installation procedure Necessary items ● Spanner wrench ● Torque wrench ● Bolt, Nut, Washer (Vary per flange type) ● AV Gasket ( Tightening torque will change if AV Gasket is not used. ) Procedure 1) Set the AV Gasket between the flanges. -
Page 7: Operating Procedure
ASAHI AV VALVES Installation,Operation and Maintenance Manual (7) Operating procedure ○ To operate the valve for opening / closing, turn the hand wheel slowly. ( To get the flow rate decreased, turn the hand wheel clockwise.) Caution To set new flow rate, turn the hand wheel counterclockwise to let the indicator of opening degree reach beyond the required level and then the hand wheel clockwise to obtain proper flow rate . -
Page 8: The Inside Of Valve
ASAHI AV VALVES Installation,Operation and Maintenance Manual (10) Disassembly procedure for cleaning the inside of valve Necessary items ● Strap Wrench (*Removal of the bonnet) ● Snap Ring Plier (*Removal of the bonnet) ● Nylon Brush (*Wash The Parts) ● Grease “Silicon Grease”... - Page 9 ASAHI AV VALVES Installation,Operation and Maintenance Manual 5) Remove the piston from the cylinder. Washing 1) Check the valve parts for damages. 2) Wash the valve parts with a nylon brush. Assembly 1) Insert the piston into the cylinder smoothly, then insert the snap ring tightly.
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Page 10: Handling Of Residual And Waste Materials
ASAHI AV VALVES Installation,Operation and Maintenance Manual 3) Check whether the piston moves smoothly. If not, wash the valve again. 4) Cycle the piston assembly to 1/2 open position to keep alignment pins from falling into the bonnet cavity. *Note ; The valve 15mm(1/2”) and 20mm(3/4”) in nominal size have alignment pins. -
Page 11: Inquires
ASAHI AV VALVES Installation,Operation and Maintenance Manual (12) Inquires ASAHI ORGANIC CHEMICALS INDUSTRY CO., LTD. Nobeoka Head Office : 2-5955, Nakanose- Cho, Nobeoka –City, Miyazaki- Pref. , Japan. Tel : (81) 982-35-0880 Fax : (81) 982-35-9350 Tokyo Head Office : (Furukawachiyoda Bldg.) 15-9, Uchikanda 2- Chome, Chiyoda-Ku, Tokyo, Japan. - Page 12 ASAHI AV VALVES Installation,Operation and Maintenance Manual Constant flow valve ASAHI AV VALVES Information in this manual is subject to change without notice. 2003. 12 Constant Flow Valves...
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