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172-65170MA-06 (VAS) 9 July 2015

Rapid Initial Air Vent

VAS

Copyright © 2015 by TLV CO., LTD.

All rights reserved

ISO 9001/ ISO 14001

Manufacturer

Kakogawa, Japan

is approved by LRQA LTD. to ISO 9001/14001

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Summary of Contents for VAS

Page 1: ...172 65170MA 06 VAS 9 July 2015 Rapid Initial Air Vent VAS Copyright 2015 by TLV CO LTD All rights reserved ISO 9001 ISO 14001 Manufacturer Kakogawa Japan is approved by LRQA LTD to ISO 9001 14001 ...

Page 2: ... on steam lines The Rapid Initial Air Vent operates by rapidly discharging the initial air when supplying water to piping then closing upon completion of discharge During operation once it has closed the air vent remains closed as long as there is internal pressure When draining piping the Rapid Initial Air Vent automatically opens to introduce air and remove water easily The Rapid Initial Air Ven...

Page 3: ...G or CAUTION item DANGER Indicates an urgent situation which poses a threat of death or serious injury WARNING Indicates that there is a potential threat of death or serious injury CAUTION Indicates that there is a possibility of injury or equipment product damage WARNING DO NOT use for toxic flammable or otherwise hazardous fluids This product is an air vent that discharges air from water piping ...

Page 4: ...mended components when repairing the product and NEVER attempt to modify the product in any way Failure to observe these precautions may result in damage to the product and burns or other injury due to malfunction or the discharge of fluids Do not use excessive force when connecting threaded pipes to the product Over tightening may cause breakage leading to fluid discharge which may cause burns or...

Page 5: ...ressure of the flow The float inside the air vent is in the lower position thus the valve is fully open and allows the air that enters the air vent and fills the area around the float to then be discharged 2 When discharge is completed as water flows into the air vent the rising water level causes the float to rise and to close the valve If there is a rapid rise in water level caused by rapidly op...

Page 6: ...product to below the conditions quoted CAUTION Use only under conditions in which no freeze up will occur Freezing may damage the product leading to fluid discharge which may cause burns or other injury CAUTION Refer to the product nameplate for detailed specifications Model Production Lot No X element Type Maximum Allowable Temperature TMA Maximum Operating Temperature TMO Nominal Diameter Maximu...

Page 7: ...g to remove any piping scraps dirt and oil Close the inlet valve after blowdown 3 This product must be installed vertically with the inlet at the bottom and the outlet at the top and should be inclined no more than 5 horizontally and front to back Figure 2 4 Install the product in a location where air is likely to collect such as a bend in the piping 5 Install the product so that the outlet pipe r...

Page 8: ...to water flow Normal Air is discharged as it accumulates with the air vent closing with no leakage when no air is present in the piping Blocked Discharge Impossible No air is discharged though air accumulates in the air vent NOTE Once the air vent closes it will remain closed until internal pressure drops to near or below atmospheric pressure This condition may be confused with a malfunction block...

Page 9: ...on maintenance repairs disassembly adjustment and valve opening closing should be carried out only by trained maintenance personnel Part During Disassembly During Reassembly Cap Nut Remove with a wrench Consult the table of tightening torques and tighten to the proper torque Union Remove being careful not to scratch the gasket sealing surface Make sure there are no pieces of the old gasket left on...

Page 10: ...15 17 21 32 40 1 1 2 25 1 Cap Nut 80 59 75 2 15 16 Valve Seat Holder 35 26 27 1 1 16 1 N m 10 kg cm NOTE Coat all threaded portions with anti seize If drawings or other special documentation were supplied for the product any torque given there takes precedence over values shown here Exploded View Cap Nut Union Valve Seat Gasket Valve Seat Valve Seat Holder Float Snap Ring Float Guide Union Gasket ...

Page 11: ...with dirt or foreign matter Clean the valve seat The inlet or outlet piping is clogged Clean the piping Water leaks when the vent is closed There is a build up of rust or scale on the valve seat or the valve seat is damaged Clean the valve seat or replace with a new valve seat The float is misshapen dirty or has a film build up Clean the float or replace with a new float The installation angle of ...

Page 12: ...er installation use handling etc by other than TLV CO LTD authorized service representatives 2 Malfunctions due to dirt scale rust etc 3 Malfunctions due to improper disassembly and reassembly or inadequate inspection and maintenance by other than TLV CO LTD authorized service representatives 4 Malfunctions due to disasters or forces of nature 5 Accidents or malfunctions due to any other cause bey...

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