Air And Vacuum Release Valves

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Pipelines having large pockets of air cause more power consumption in the system while decreasing the flow that can rupture pipelines under pressure. Air release valves vent this trapped air which usually collects at the high points in the pipeline.

DAYTON -

Release Valve Kits

StyleModelPrice (inc. GST)
A803-37A SGD 14.70
B18-40A SGD 14.55
C46-38 SGD 11.92
RFQ
PLAST-O-MATIC -

ARV Series Thermoplastic Air Release Valves

StyleModelPrice (inc. GST)
AARV050VT-PV SGD 474.75
RFQ
AARV050EPT-CP SGD 571.28
RFQ
BARV400VT-CP SGD 4493.40
RFQ
BARV300EPT-CP SGD 2529.39
RFQ
BARV300VT-CP SGD 2543.18
RFQ
CARV200EPT-CP SGD 1081.49
RFQ
CARV200VT-CP SGD 1093.31
RFQ
CARV150EPT-CP SGD 1067.70
RFQ
CARV150VT-CP SGD 1081.49
RFQ
CARV125EPT-CP SGD 990.87
RFQ
CARV125T-CP SGD 847.07
RFQ
AARV100EPT-CP SGD 634.32
RFQ
AARV100VT-CP SGD 648.11
RFQ
AARV075EPT-CP SGD 604.77
RFQ
AARV075VT-CP SGD 620.53
RFQ
AARV050VT-CP SGD 585.07
RFQ
AARV050EPT-PV SGD 462.93
RFQ
DARV400EPT-PV SGD 2320.57
RFQ
DARV400VT-PV SGD 2334.36
RFQ
DARV300EPT-PV SGD 1867.49
RFQ
DARV300VT-PV SGD 1879.31
RFQ
EARV200EPT-PV SGD 973.14
RFQ
EARV200VT-PV SGD 982.99
RFQ
EARV150EPT-PV SGD 817.52
RFQ
EARV150VT-PV SGD 829.34
RFQ
StyleModelPrice (inc. GST)
ACARD100EP-PV SGD 817.52
RFQ
ACARD100V-PV SGD 835.25
RFQ
ACARD200EP-PV SGD 1097.25
RFQ
ACARD200V-PV SGD 1116.95
RFQ
ACARD400EP-PV SGD 1950.23
RFQ
ACARD400V-PV SGD 1969.93
RFQ
ACARD100EP-CP SGD 996.78
RFQ
ACARD100V-CP SGD 1010.57
RFQ
ACARD200EP-CP SGD 1280.45
RFQ
ACARD200V-CP SGD 1296.21
RFQ
ACARD400EP-CP SGD 3455.25
RFQ
ACARD400V-CP SGD 3467.07
RFQ
VAL-MATIC -

Air Release Valves

Val-Matic air release valves are designed for use in pipelines, handling solid-laden fluids, for continually releasing unwanted air and feature 316 stainless steel internal components for withstanding exposure to hydrogen sulfide & aggressive fluids. These units come equipped with a hexagonal stem in round bushing guided floats for preventing the accumulation of debris and a non-clog design for minimising the need for backwashing. Choose from a wide variety of these NSF 61 & 372 certified valves, available in 150 & 175 psi maximum pressures on Raptor Supplies.

StyleModelInlet SizeMax. Fluid Temp.Max. PressurePrice (inc. GST)
A15A.31"250° F175 psi SGD 325.08
B381"250 Degrees F150 psi SGD 921.44
A15A1/2"250 Degrees F175 psi SGD 307.18
B38.22"250 Degrees F150 psi SGD 970.88
C48A2"250 Degrees F150 psi SGD 1799.24
C48A.23"250 Degrees F150 psi SGD 1958.68
A15A.23/4"250 Degrees F175 psi SGD 297.33
C48A.34"250 Degrees F150 psi SGD 2366.37
VAL-MATIC -

Air Release/Air Vacuum Valves

StyleModelInlet SizeMax. PressureOutlet SizePrice (inc. GST)
A201C.21"300 psi1" SGD 1257.92
A202C.22"300 psi2" SGD 1825.96
B801A2"150 psi1" SGD 3412.18
B802A2"150 psi2" SGD 4785.91
A203C.23"300 psi3" SGD 3952.81
B803A3"150 psi3" SGD 6181.82
A204C.24"300 psi4" SGD 5251.22
VAL-MATIC -

Air Vacuum Valves

StyleModelInlet SizeOutlet SizePrice (inc. GST)
A101ST1"1" SGD 1242.55
A100ST1/2"1/2" SGD 1073.32
A102ST2"2" SGD 2084.58
A103STK3"3" SGD 3057.68
PLAST-O-MATIC -

Air Release Valve, PVC, 1-1/2 Inch, Fkm, Socket

ModelItemPrice (inc. GST)
ARV150VS-PVCT7VAQ SGD 810.78
MARTINS INDUSTRIES -

Safety Release Valve, 130 psi Pressure

ModelItemPrice (inc. GST)
SP-0043CE8PWZ SGD 60.39
See Details
MARTINS INDUSTRIES -

Safety Release Valve, 155 psi Pressure

ModelItemPrice (inc. GST)
SP-0083CE8PYK SGD 60.39
See Details
MARTINS INDUSTRIES -

Safety Release Valve, 120psi Pressure

ModelItemPrice (inc. GST)
SP-0084CE8PYL SGD 59.07
See Details

Air And Vacuum Release Valves

Air & vacuum release valves are designed for venting trapped air which collects at high points in the pipeline in manufacturing and production facilities. Raptor Supplies offers various air release valves from brands like Val-Matic, Plast-O-Matic and Marine Industries. These air release valves continuously release the accumulated air from the system, thereby preventing the formation of any large air pockets that can damage the pipelines. These air release valves feature a stainless steel float / poppet that opens / closes as pressure changes. PVC air release valves feature poppet style mechanism for venting out the accumulated air inside the pipeline. PVC air release valves are suitable for applications dealing with low pressures in piping systems. These air release valves are easy to install onto the pipeline ends, usually at a high point for releasing the air. Selected models feature 316 stainless steel construction for withstanding high pressures up to 300 psi while ensuring high resistance against fluids and reactive chemicals. These air release valves have a rubber orifice button constructed of ethylene propylene diene monomer for promoting watertight shutoff during venting. These air release valves are available in 150, 175 & 300 psi pressure ratings on Raptor Supplies, a trusted air release valve supplier of Val-Matic, Plast-O-Matic and Marine Industries.

Uses

Air & vacuum release valves automatically exhaust the small amounts of air that usually collects at high points in closed loop pipelines. These SS & PVC air release valves are ideal for water purification, chemical processing, marine and wastewater management industries.

Features

Vestil Air Release Valves:

  • Vestil air release valves feature resilient seating for providing positive shutoff during operation, thereby ensuring maximum safety & pipeline system protection.
  • These air release valves have 316 stainless steel floats & internal trim for minimising wear against highly abrasive conditions.
  • Vestil air release valves feature extended enclosures with a sloped bottom for preventing abrasive materials from reaching the operating mechanism.
  • These air release valves have rugged floats for accelerating the valve closure, thereby reducing leakage and chances of valve clogging.

Plast-O-Matic air release valves:

  • Plast-O-Matic air release valves feature rugged design for allowing safe expulsion of accumulated unwanted air in piping systems.
  • These air release valves have a self guided poppet for assuring the emission of system liquid is minimal before sealing.
  • Their true union simplifies the process of valve removal or inspection while ensuring minimum piping breakdown.
  • These air release valves require minimal closing pressure (0 psi). The valve closes as the liquid rises after pushing out the unwanted air.
  • Plast-O-Matic air release valves feature EPDM seals for sealing the valve shut at system pressure
  • These air release valves have poppet style seals. These seals are durable and do not deform under high pressure, unlike hollow ball style seals.
  • Plast-O-Matic air release valves have no metal components for protecting the system purity while protecting the valve against harsh chemicals.

Working Mechanism

Air release valves are connected to pipelines at the highest point where air collects. Air bubbles that are trapped inside the pipeline enter the valve while displacing the liquid inside the valve, essentially lowering the liquid level. When the liquid level drops to the point where it no longer buoys the float, the valve float drops. The seat pulls away from the orifice by this motion, thereby opening the air release valve and releasing the accumulated air into the atmosphere. As the air is released / vented, the water / liquid re-enters the air release valve and once again buoys the float, thus lifting it to the point where the seat presses against the orifice, thereby closing the valve. This cycle of air release valves automatically repeats to maintain the air free system.

Standards and Approvals

  • These air release valves are AWWA C512 rated and are NSF 61 & 372 Certified. These valves also meet AWWA C514 standards.

Frequently Asked Questions

What size air release valves should be chosen for the application in hand?

It is suggested that valves should be 1 inch per 1 feet of pipe diameter. Use correct sizes of valves for the application in hand, ensuring the safety of the pipelines.

How to maintain air release valves?

Air release valves do not require maintenance or lubrication. If the situation demands maintenance, disconnect the air release valve from the pipeline by closing the shut-off valve. Then, relieve the excess pressure present inside the pipeline and the valve.

How to install the air release valves?

The user should install these air release valves vertically at system high points with the inlet down. For pipeline service, provide drainage and adequate screened venting. During the valve closure, little fluid discharge may occur. That is why the vent lines must extend to the open drain area.

Where to install the air release valves?

Ideally, users should install the vacuum release & air release valves at a gap of 800 metres on long pipes & complex pipeline systems for properly drawing and venting air into the pipeline system. Otherwise, dislodged air pockets could flow downstream to form large pockets of air at the top section of the pipelines.

How do air release valves work?

The pressure inside the valve acts against the valve seat & the resultant force generated from this pressure opens the valve. The valve head stays open until the air pressure drops to zero and all of the accumulated air is released, after which the valve gets closed again. This cycle repeats automatically, releasing all the accumulated air in intervals.

How to flush an air release valve?

Open the blow-off valve's bottom port and use caution, as this action releases system pressure within the valve. Then, open the blow-off valve's top, thereby allowing the flush water to pass from the valve. Lastly, observe that the water is flushed until the solids wash out of the valve.

What is the difference between an air relief valve and an air release valve?

The air release valves allow the rising liquid to force the accumulated air out from the piping system. However, air relief valves do not vent the accumulated air below the set pressure point. The air release valves are open at atmospheric pressure and close automatically if the liquid is present inside the valve.

Why are air release valves used in water applications?

Air release valves are crucial for ejecting the trapped air for ensuring the smooth flow of water in irrigation systems and large & complex pipelines.

What is the difference between degassing and depressurisation in valves?

Air release valves are open when the system is depressurised. These valves open when the liquid level drops. However, degassing valves are not suitable for expelling large volumes of air at system startup due to their small vet orifice.

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