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Serial No.: H-V019-E-08
Constant flow valve
Userʼs Manual
Thank you for choosing our product.
This Userʼs manual contains important information for safe use of our
product, so please be sure to read it before handling the product.
After reading this manual, please be sure to keep it in a place where the
user can see it at any time.
[User's Manual] Constant flow valve
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Table of Contents
Related Manuals for AsahiAV VCF Series
Summary of Contents for AsahiAV VCF Series
- Page 1 Serial No.: H-V019-E-08 Constant flow valve Userʼs Manual Thank you for choosing our product. This Userʼs manual contains important information for safe use of our product, so please be sure to read it before handling the product. After reading this manual, please be sure to keep it in a place where the user can see it at any time.
- Page 2 Serial No.: H-V019-E-08 -SAFETY PRECAUTIONS- This Userʼs manual is written on the assumption that the person who Hand Wheels our products has a basic knowledge of our products, electrical equipment, machinery, control, etc., and it contains technical terms depending on the handling contents. Please read this manual carefully and fully understand the contents and observe the safety precautions for proper use.
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Page 3: Table Of Contents
Serial No.: H-V019-E-08 Table of contents 1. Our product warranty coverage ··························································································· 4 Applicable to ..................................4 Warranty Period ................................. 4 Guaranteed range ................................4 Disclaimer ................................... 4 2. Safety Instructions ················································································································ 5 Unpacking, Transportation and Storage ........................5 Product Handling ................................6 3. -
Page 4: Our Product Warranty Coverage
Serial No.: H-V019-E-08 1. Our product warranty coverage Unless otherwise stated in the Contract or Specifications, etc., the warranty for the piping material products (hereinafter referred to as "applicable products") such as valves manufactured or sold by us is as follows. Applicable to This warranty applies only when the product is used in Japan. -
Page 5: Safety Instructions
Serial No.: H-V019-E-08 2. Safety Instructions Unpacking, Transportation and Storage Serious injury can result. Forcing ▶ When hanging or slinging a valve, pay sufficient attention to safety, and do not enter under the load. The valve can be damaged, or leak. Prohibition ▶... -
Page 6: Product Handling
Serial No.: H-V019-E-08 Product Handling Serious injury can result. Forcing ▶ If positive pressure gas is used for our resin piping material, a dangerous condition may occur due to the repulsive force peculiar to compressible fluids even if the pressure is the same as the water pressure. Therefore, be sure to take safety measures for the surrounding area, such as covering the piping with protective materials. -
Page 7: Name Of Each Part
Serial No.: H-V019-E-08 3. Name of each part Size: 15, 20mm Flow Body [14] Sleeve Bonnet [15] Cylinder [16] Piston [17] Cap nut Plug [18] Spring base [19] Thrust ring Stop ring [20] Spring (A) Orifice [21] Spring (B) Seat [23] Washer (B) [10]... - Page 8 Serial No.: H-V019-E-08 Size: 25mm Type A Flow Type B, C Body [14] Sleeve Bonnet [15] Cylinder [16] Piston [19] Thrust ring Plug [20] Spring (A) Spring base [21] Spring (B) Stop ring [22] Washer (A) Orifice [23] Washer (B) Seat [27] Hand Wheel...
- Page 9 Serial No.: H-V019-E-08 Size: 50, 80mm Type A Flow Type B, C, D Body [14] Sleeve Bonnet [15] Cylinder [16] Piston [19] Thrust ring Plug [20] Spring (A) Spring base [21] Spring (B) Stop ring [22] Washer (A) Orifice [23] Washer (B) Seat [27]...
- Page 10 Serial No.: H-V019-E-08 Size: 100mm Type C, D Flow Body [14] Sleeve Bonnet [15] Cylinder [16] Piston [19] Thrust ring Plug [20] Spring (A) Spring base [21] Spring (B) Stop ring [22] Washer (A) Orifice [23] Washer (B) Seat [27] Hand Wheel [10] O-ring (A)
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Page 11: Product Specifications
Serial No.: H-V019-E-08 4. Product Specifications Model number table [User’s Manual] Constant flow valve - 11 -... -
Page 12: Relationship Between Maximum Allowable Pressure And Temperature
Serial No.: H-V019-E-08 Relationship between maximum allowable pressure and temperature Size: 15mm 〜 80mm Size: 100mm [User’s Manual] Constant flow valve - 12 -... -
Page 13: Type
Serial No.: H-V019-E-08 Type ▶ Type-A (25mm〜80mm) There is a pressure inlet on the valve body, and there is no retention of fluid. Because the fluid is constantly moving inside, it is ideal for ultrapure water lines in semiconductor plants where there is no dead space and fluid retention is extremely disliked. -
Page 14: Principle And Structure
Serial No.: H-V019-E-08 Principle and structure When the fluids flow as shown by the arrows in Fig. 4-1 (Type-A structure diagram) Fig. 1, a pressure differential △P (P ) occurs before and after the orifice formed by the conical plug and the R part of the orifice tube. Stem Cylinder When the differential pressure △P increases,... -
Page 15: Setting Flow Rate Range And Operating Differential Pressure Range
Serial No.: H-V019-E-08 Setting flow rate range and operating differential pressure range Classifica Operating differential pressure Size Flow rate(m /hr) Range ability tion MPa{kgf/cm Type-B 0.04〜 0.8 20 : 1 0.02 〜0.1 {0.2〜1.0} 15mm (½") Type-C 0.08〜 0.8 10 : 1 0.03 〜0.2 {0.3〜2.0} Type-B 0.06〜... -
Page 16: Piping Method
Serial No.: H-V019-E-08 5. Piping method Serious injury can result. Forcing ▶ When hanging or slinging a valve, pay sufficient attention to safety, and do not enter under the load. ▶ Be sure to perform safety inspections of the machine tool and power tool beforehand. - Page 17 Serial No.: H-V019-E-08 Preparations ▶ Spanner ▶ screw/nut/washer ▶ torque wrench ▶ AV packing [Procedure] 1) Set AV packing between the flanges. 2) Insert the washer and bolt from the connecting flange side. Insert the washer and nut from the valve side and tighten temporarily by hand.
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Page 18: Operation Method
Serial No.: H-V019-E-08 6. Operation method The valve can be damaged or leak. Prohibition ▶ Do not turn the Hand Wheel more than necessary with excessive force when fully closing and opening the valve. Valve accuracy may be reduced. ▶ Never operate the pump outside the range of the flow rate scale. Especially, never operate the pump below the minimum scale. -
Page 19: Disassembly/Assembly Method For Internal Cleaning
Serial No.: H-V019-E-08 7. Disassembly/assembly method for internal cleaning The valve can be damaged, or leak. Prohibition ▶ Do not disassemble the product except for the parts listed. The valve can be damaged, or leak. Forcing ▶ If it is difficult to disassemble (parts stuck), do not forcibly. Contact us. ▶... -
Page 20: Disassembly
Serial No.: H-V019-E-08 Preparations Size Tool name Usage 15mm 20mm 25mm 50mm 80mm 100mm Belt Wrench Detaching and (Applicable pipe 80mm 120mm 150mm 200mm attaching the diameter) hood Snap ring pliers for Stop ring holes 25mm 60mm 100mm installation and (Applicable ring removal diameter) -
Page 21: Cleaning Procedure
Serial No.: H-V019-E-08 5) Remove the Stop ring with the Stop ring pliers. Stop ring 6) Pull out the piston from the cylinder. Cleaning [Procedure] 1) Check each part for scratches, damage, etc. 2) Clean each part with a nylon brush (the material that scratches the part cannot be used). [User’s Manual] Constant flow valve - 21 -... -
Page 22: Assembly
Serial No.: H-V019-E-08 Assembly [Procedure] 1) Assemble in the reverse order of disassembly. Insert the piston smoothly into the cylinder and fit the Stop ring securely. 2) If the silicone grease on the O-ring of the cylinder runs out, apply an appropriate amount to the surface. 3) Check that the piston operates smoothly. - Page 23 Serial No.: H-V019-E-08 5) Tighten by hand and with a belt wrench until the alignment mark of the bonnet and the body is aligned. Perform full tightening. The valve can be damaged or leak. Forcing ▶ The Size 15mm, 20mm does not have a match mark. Do not tighten unnecessarily. 6) After assembling the valve, adjust the flow rate scale to the set flow rate.
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Page 24: Inspection Item
Serial No.: H-V019-E-08 8. Inspection item The valve can be damaged, or leak. Forcing ▶ Maintenance should be performed every 3 to 6 months as a guide in order to keep the watch in normal condition and use it for a long time. Pay particular attention to temperature changes and aging during long-term storage or shutdown or use. -
Page 25: Periodic Inspection
Serial No.: H-V019-E-08 Periodic inspection ●Guideline for the inspection cycle: 3 months Inspection items and Guideline of Check point Remedy for malfunctions inspection methods judgment Vibration Valve Recheck the operating conditions difference (palpation) and remove the source of vibration. from other (Ref: 2. -
Page 26: Cause Of Malfunction And Remedy
Serial No.: H-V019-E-08 9. Cause of malfunction and remedy There is a danger of injury. Forcing ▶ If any malfunction is found, immediately stop using the product and take appropriate action. ▶ When removing the valve from the piping when replacing the valve or parts, completely remove the fluid from the piping before starting work. -
Page 27: Disposal Method Of Residual Materials And Waste Materials
Serial No.: H-V019-E-08 10. Disposal method of residual materials and waste materials When burnt, toxic gas is generated. Forcing ▶ When disposing of the product or parts, please dispose of them according to the guidelines of each local authority by a professional disposal company. [User’s Manual] Constant flow valve - 27 -... -
Page 28: Inquiries
Serial No.: H-V019-E-08 Inquiries Contact the nearest dealer, our sales office, or our web website for inquiries about this product. [Userʼs manual] Constant flow valve https://www.asahi-yukizai.co.jp/en Please note that the content of this manual is subject to change without notice. April 2024 [User’s Manual] Constant flow valve - 28 -...
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