Yoshitake ASV-1000 Product Manual
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Yoshitake ASV-1000 Product Manual

Air operated valve
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Thank you very much for choosing the Yoshitake's product. To ensure the correct and safe use of the
product please read this manual before use. This manual shall be kept with care for future references.
The symbols used in this manual have the following meanings.
Please download the English instruction manual for this product from
"https://www. yoshitake-inc.com
Warning
Caution
MODEL ASV-1000
AIR OPERATED VALVE
PRODUCT MANUAL
日本語
This symbol indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
This symbol indicates a hazardous situation that, if not avoided, may result
in minor or moderate injury or may result in only property damage.

Table of Contents

1．Specifications ············································ 1-2
2．Operation ················································· 3-4
3．1 Calculation Formula ································ 5
4．Installation
4．1 Piping Example ····································· 6
4．2 Precaution for Installation ······················ 6-8
6．1 Specifications ········································ 9
6．2 Installation and use ····························· 9-11
7．2 Troubleshooting ···································· 13
7．3 Exploded View ································ 14-15
7．4 Disassembly and Reassembly ············· 16-17
About After-Sales Service
คู ่ ม ื อ ภาษาไทย
汉语
■EPDT-420a■

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Summary of Contents for Yoshitake ASV-1000

  • Page 1: Table Of Contents

    AIR OPERATED VALVE PRODUCT MANUAL Thank you very much for choosing the Yoshitake’s product. To ensure the correct and safe use of the product please read this manual before use. This manual shall be kept with care for future references.

  • Page 2: 1．Specifications

    G1/4 Operation Normally close Normally open ● Do not use ASV-1000-R with liquids, as the pressure shock may cause the piping or product to rupture. ● For the specification other than the above, please contact us. * 1 Flow direction...
  • Page 3 * Do not use a Pilot air pressure in excess of 1.0 MPa in the actuator. Also, do not supply any fluid other than compressed air inside the actuator. * 1 ASV-1000-R Minimum pilot air pressure - working pressure Working pressure (MPa)
  • Page 4 Operation ・ASV-1000、1000-R 1. Closing operation When pilot air pressure is not applied in the actuator, valve disc is closed by power of spring. Spring Actuator Valve disc Body Fig. 2 2. Opening operation When compressed air is applied from the pilot port, pilot air pressure is added to the bottom part of the piston, overcoming the load of the spring and pushing the piston up, causing the valve disc to open.
  • Page 5 ・ ASV-1000-C 1. Opening operation When pilot air pressure is not applied in the actuator, valve disc is closed by power of spring. Spring Valve disc Actuator Body Flow direction Fig. 4 2. Close operation When compressed air is applied from the upper pilot port, pilot air pressure is added to the upper part of the piston, overcoming the load of the spring and pushing the piston down, causing the valve disc to close.

  • Page 6: 3．Nominal Size Selection

    １ ２ k: 1+0.0013 × {superheated steam temp. [ºC]- saturated steam temp. [ºC]} G: Specific gravity (relative to air for gas, or relative to water for liquid) ■ Cv value Nominal size ASV-1000、1000-R 13.7 22.0 34.0 50.6 64.7 ASV-1000-C ■EPDT-420a■...

  • Page 7: 4．1 Piping Example

    Pressure Pressure Gauge Gauge Strainer Stop Valve Stop Valve ASV-1000 Air Operated Valve Fig. 6 4．2 Precaution for installation Caution 1. Do not disassemble the product unless it is necessary. * Failure to follow this notice may prevent the product from functioning properly.
  • Page 8 15. To change the connection position of the pilot port, apply compressed air through the pilot port, let the valve disc rise (check the indicator rise), and then rotate the actuator. (See Fig. 7.) For the ASV-1000- C, rotate the actuator without applying compressed air.

  • Page 9: 5．Operating Procedure

    *1 Minimum maintenance space for disassembly ・ASV-1000、1000-R (mm) Size Fig. 8 ・ASV-1000-C (mm) Size Fig. 9 5．Operating procedure 5．1 Warning and caution for operation Warning 1. Do not touch the product with bare hands in case of high temperature fluid.

  • Page 10: 6．Optional Items

    4. When pressure is suddenly applied, the valve may open instantly and fluid may leak out. 6．Optional item 6．1 Specifications *Optional items can be used with ASV-1000 and 1000-R, not with ASV-1000-C. ・Stroke limiter It is possible to adjust the maximum flow rate and minimum flow rate (not fully closed).
  • Page 11 U Nut Option Indicator [No.4] [No.1] Indicator Guide [No.2] Spindle Hex nut [No.3] Pilot air Piston pressure Without air pressure With air pressure Pilot port in the actuator in the actuator Initial set state How to adjust the stroke limiter 1.

  • Page 12: 7．Maintenance

    Caution 1. Do not adjust the maximum flow rate with air pressure in the actuator. * The screw may be damaged due to the load on the screw. 2. Do not adjust the minimum flow rate without air pressure in the actuator. * The load on the screw may cause damage to the threads and the nut may become stuck.
  • Page 13 7.1.1 Consumable parts and replacement time To maintain product function and performance, the following parts have recommended replacement times. When the recommended replacement time has arrived, please replace the parts on a periodic basis. Caution 1. When the recommended replacement time has arrived, please replace the parts on a periodic basis.

  • Page 14: 7．2 Troubleshooting

    Poor sealing of lip packing (See Fig. 4). (Air leaks continuously from the bottom Replace the actuator set. hole of the actuator) (ASV-1000-C) 2. Fluid keeps flowing, does not The pilot air pressure is applied. (ASV- Remove pilot air pressure from the stop.

  • Page 15: 7．3 Exploded View

    7．3 Exploded view ・ASV-1000、1000-R Indicator Actuator set Indicator cap Pilot port Packing case Disk Detection port Gasket Seat part Body The parts name shown in are available as consumable supply. Fig.10 -14- ■EPDT-420a■...
  • Page 16 ・ASV-1000-C Pilot port Actuator set Plug Packing case Disk O ring Gasket 検出ポート Detection port Body The parts name shown in are available as consumable supply. Fig.11 -15- ■EPDT-420a■...

  • Page 17: 7．4 Disassembly And Reassembly

    * Damage on valve disc [4] or seat part of body (See Fig. 9) leads to valve leakage. Also, replace gasket [3] with new one. If not, it leads to outside leakage. * For gasket, be sure to use gasket which Yoshitake prepares. If using other gasket, it may lead to outside leakage.
  • Page 18 7.4.2.2 Reassembly procedure ・ASV-1000、1000-R 1. Add pilot air pressure through pilot port of the actuator set. 2. Put new gasket [3] into the body [1], and then screw in the actuator set with pilot air pressure by hand. Apply lubricant (Recommended: CLUBER PASTE UH1 96-402 NSF) to the gasket [3] before inserting it into the body [1].
  • Page 19 ( e.g. in case of corrosion due to outdoor use). Fire, flood, earthquake, thunder and other natural disasters. Consumable parts such as O-ring, gasket, diaphragm and etc. Yoshitake is not liable for any damage or loss caused by malfunction or defect of the product. PDD-046f...

This manual is also suitable for:

Asv-1000-rAsv-1000-c

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