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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Home
Plumbing
Pressure and Temperature Control Valves
Air and Vacuum Release Valves

Air And Vacuum Release Valves

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<p>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.</p>

PLAST-O-MATIC -

ARV Series Air Release Valves, CPVC, Flanged Connection

Style	Model	MPN
A	ARV050EPFL-CP	ARV050EPFL-CP	RFQ
A	ARV050VFL-CP	ARV050VFL-CP	RFQ
A	ARV075EPFL-CP	ARV075EPFL-CP	RFQ
A	ARV075VFL-CP	ARV075VFL-CP	RFQ
A	ARV100EPFL-CP	ARV100EPFL-CP	RFQ
A	ARV100VFL-CP	ARV100VFL-CP	RFQ
B	ARV125EPFL-CP	ARV125EPFL-CP	RFQ
B	ARV125VFL-CP	ARV125VFL-CP	RFQ
B	ARV150EPFL-CP	ARV150EPFL-CP	RFQ
B	ARV150VFL-CP	ARV150VFL-CP	RFQ
B	ARV200EPFL-CP	ARV200EPFL-CP	RFQ
B	ARV200VFL-CP	ARV200VFL-CP	RFQ
C	ARV300EPFL-CP	ARV300EPFL-CP	RFQ
C	ARV300VFL-CP	ARV300VFL-CP	RFQ
C	ARV400EPFL-CP	ARV400EPFL-CP	RFQ
C	ARV400VFL-CP	ARV400VFL-CP	RFQ

PLAST-O-MATIC -

ARV Series Air Release Valves, PVC, Flanged Connection

Style	Model	MPN
A	ARV050EPFL-PV	ARV050EPFL-PV	RFQ
A	ARV050VFL-PV	ARV050VFL-PV	RFQ
A	ARV075EPFL-PV	ARV075EPFL-PV	RFQ
A	ARV075VFL-PV	ARV075VFL-PV	RFQ
A	ARV100EPFL-PV	ARV100EPFL-PV	RFQ
A	ARV100VFL-PV	ARV100VFL-PV	RFQ
B	ARV125EPFL-PV	ARV125EPFL-PV	RFQ
B	ARV125VFL-PV	ARV125VFL-PV	RFQ
B	ARV150EPFL-PV	ARV150EPFL-PV	RFQ
B	ARV150VFL-PV	ARV150VFL-PV	RFQ
B	ARV200EPFL-PV	ARV200EPFL-PV	RFQ
B	ARV200VFL-PV	ARV200VFL-PV	RFQ
C	ARV300EPFL-PV	ARV300EPFL-PV	RFQ
C	ARV300VFL-PV	ARV300VFL-PV	RFQ
C	ARV400EPFL-PV	ARV400EPFL-PV	RFQ
C	ARV400VFL-PV	ARV400VFL-PV	RFQ

PLAST-O-MATIC -

ARV Series Air Release Valves, CPVC, Socket Connection

Style	Model	MPN
A	ARV050EPS-CP	ARV050EPS-CP	RFQ
A	ARV050VS-CP	ARV050VS-CP	RFQ
A	ARV075EPS-CP	ARV075EPS-CP	RFQ
A	ARV075VS-CP	ARV075VS-CP	RFQ
A	ARV100EPS-CP	ARV100EPS-CP	RFQ
A	ARV100VS-CP	ARV100VS-CP	RFQ
B	ARV125EPS-CP	ARV125EPS-CP	RFQ
B	ARV125VS-CP	ARV125VS-CP	RFQ
B	ARV125VT-CP	ARV125VT-CP	RFQ
B	ARV150EPS-CP	ARV150EPS-CP	RFQ
B	ARV150VS-CP	ARV150VS-CP	RFQ
B	ARV200EPS-CP	ARV200EPS-CP	RFQ
B	ARV200VS-CP	ARV200VS-CP	RFQ
C	ARV300EPS-CP	ARV300EPS-CP	RFQ
C	ARV300VS-CP	ARV300VS-CP	RFQ
C	ARV400EPS-CP	ARV400EPS-CP	RFQ
C	ARV400VS-CP	ARV400VS-CP	RFQ

PLAST-O-MATIC -

ARV Series Air Release Valves, PVC, Socket Connection

Style	Model	MPN
A	ARV050EPS-PV	ARV050EPS-PV	RFQ
A	ARV050VS-PV	ARV050VS-PV	RFQ
A	ARV075EPS-PV	ARV075EPS-PV	RFQ
A	ARV075VS-PV	ARV075VS-PV	RFQ
A	ARV100EPS-PV	ARV100EPS-PV	RFQ
A	ARV100VS-PV	ARV100VS-PV	RFQ
B	ARV125EPS-PV	ARV125EPS-PV	RFQ
B	ARV125VS-PV	ARV125VS-PV	RFQ
B	ARV150EPS-PV	ARV150EPS-PV	RFQ
B	ARV200EPS-PV	ARV200EPS-PV	RFQ
B	ARV200VS-PV	ARV200VS-PV	RFQ
C	ARV300EPS-PV	ARV300EPS-PV	RFQ
C	ARV300VS-PV	ARV300VS-PV	RFQ
C	ARV400EPS-PV	ARV400EPS-PV	RFQ
C	ARV400VS-PV	ARV400VS-PV	RFQ

PLAST-O-MATIC -

CARD Series Air Release and Degassing Valves, CPVC

Style	Model	MPN
A	CARD100EPFL-CP	CARD100EPFL-CP	RFQ
B	CARD100EPS-CP	CARD100EPS-CP	RFQ
A	CARD100EPT-CP	CARD100EPT-CP	RFQ
A	CARD100VFL-CP	CARD100VFL-CP	RFQ
B	CARD100VS-CP	CARD100VS-CP	RFQ
A	CARD100VT-CP	CARD100VT-CP	RFQ
A	CARD200EPFL-CP	CARD200EPFL-CP	RFQ
B	CARD200EPS-CP	CARD200EPS-CP	RFQ
A	CARD200EPT-CP	CARD200EPT-CP	RFQ
A	CARD200VFL-CP	CARD200VFL-CP	RFQ
B	CARD200VS-CP	CARD200VS-CP	RFQ
A	CARD200VT-CP	CARD200VT-CP	RFQ
A	CARD400EPFL-CP	CARD400EPFL-CP	RFQ
B	CARD400EPS-CP	CARD400EPS-CP	RFQ
A	CARD400EPT-CP	CARD400EPT-CP	RFQ
A	CARD400VFL-CP	CARD400VFL-CP	RFQ
B	CARD400VS-CP	CARD400VS-CP	RFQ
A	CARD400VT-CP	CARD400VT-CP	RFQ

PLAST-O-MATIC -

CARD Series Air Release and Degassing Valves, PVC

Style	Model	MPN
A	CARD100EPFL-PV	CARD100EPFL-PV	RFQ
B	CARD100EPS-PV	CARD100EPS-PV	RFQ
A	CARD100EPT-PV	CARD100EPT-PV	RFQ
A	CARD100VFL-PV	CARD100VFL-PV	RFQ
B	CARD100VS-PV	CARD100VS-PV	RFQ
A	CARD100VT-PV	CARD100VT-PV	RFQ
A	CARD200EPFL-PV	CARD200EPFL-PV	RFQ
B	CARD200EPS-PV	CARD200EPS-PV	RFQ
A	CARD200EPT-PV	CARD200EPT-PV	RFQ
A	CARD200VFL-PV	CARD200VFL-PV	RFQ
B	CARD200VS-PV	CARD200VS-PV	RFQ
A	CARD200VT-PV	CARD200VT-PV	RFQ
A	CARD400EPFL-PV	CARD400EPFL-PV	RFQ
B	CARD400EPS-PV	CARD400EPS-PV	RFQ
A	CARD400EPT-PV	CARD400EPT-PV	RFQ
A	CARD400VFL-PV	CARD400VFL-PV	RFQ
B	CARD400VS-PV	CARD400VS-PV	RFQ
A	CARD400VT-PV	CARD400VT-PV	RFQ

DAYTON -

Release Valve Kits

Style	Model	MPN	Price (ex. VAT)
A	18-40A	18-40A	€9.10
B	46-38	46-38	€7.56
C	803-37A	803-37A	€9.33

PLAST-O-MATIC -

ARV Series Thermoplastic Air Release Valves

Style	Model	Inlet Size	Body Material	Seal Material	Price (ex. VAT)
A	ARV125T-CP	-	-	-	€655.58	RFQ
A	ARV150EPT-CP	1 1/2"	CPVC	EPDM	€826.33	RFQ
B	ARV150VT-PV	1 1/2"	PVC	Viton	€641.86	RFQ
B	ARV150EPT-PV	1 1/2"	PVC	EPDM	€632.71	RFQ
A	ARV150VT-CP	1 1/2"	CPVC	Viton	€837.01	RFQ
B	ARV125VT-PV	1 1/4"	PVC	Viton	€582.40	RFQ
B	ARV125EPT-PV	1 1/4"	PVC	EPDM	€573.25	RFQ
A	ARV125EPT-CP	1 1/4"	CPVC	EPDM	€766.87	RFQ
C	ARV100VT-PV	1"	PVC	Viton	€420.79	RFQ
C	ARV100EPT-CP	1"	CPVC	EPDM	€490.92	RFQ
C	ARV100EPT-PV	1"	PVC	EPDM	€386.22
C	ARV100VT-CP	1"	CPVC	Viton	€501.59	RFQ
C	ARV050EPT-PV	1/2"	PVC	EPDM	€320.24
C	ARV050VT-PV	1/2"	PVC	Viton	€367.43	RFQ
C	ARV050VT-CP	1/2"	CPVC	Viton	€452.81	RFQ
C	ARV050EPT-CP	1/2"	CPVC	EPDM	€442.13	RFQ
A	ARV200VT-CP	2"	CPVC	Viton	€846.15	RFQ
B	ARV200EPT-PV	2"	PVC	EPDM	€753.15	RFQ
B	ARV200VT-PV	2"	PVC	Viton	€760.78	RFQ
A	ARV200EPT-CP	2"	CPVC	EPDM	€837.01	RFQ
D	ARV300EPT-CP	3"	CPVC	EPDM	€1,957.59	RFQ
D	ARV300VT-CP	3"	CPVC	Viton	€1,968.26	RFQ
E	ARV300EPT-PV	3"	PVC	EPDM	€1,445.32	RFQ
E	ARV300VT-PV	3"	PVC	Viton	€1,454.47	RFQ
C	ARV075VT-PV	3/4"	PVC	Viton	€344.78	RFQ

PLAST-O-MATIC -

CARD Series Air Release Valves

Style	Model	Inlet Size	Body Material	Seal Material	Price (ex. VAT)
A	CARD100EP-PV	1"	PVC	EPDM	€632.71	RFQ
A	CARD100V-PV	1"	PVC	Viton	€646.43	RFQ
A	CARD100EP-CP	1"	CPVC	EPDM	€771.45	RFQ
A	CARD100V-CP	1"	CPVC	Viton	€782.12	RFQ
A	CARD200EP-PV	2"	PVC	EPDM	€849.20	RFQ
A	CARD200V-PV	2"	PVC	Viton	€864.45	RFQ
A	CARD200EP-CP	2"	CPVC	EPDM	€990.99	RFQ
A	CARD200V-CP	2"	CPVC	Viton	€1,003.19	RFQ
A	CARD400EP-PV	4"	PVC	EPDM	€1,509.35	RFQ
A	CARD400V-PV	4"	PVC	Viton	€1,524.60	RFQ
A	CARD400EP-CP	4"	CPVC	EPDM	€2,674.15	RFQ
A	CARD400V-CP	4"	CPVC	Viton	€2,683.30	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.

Style	Model	Inlet Size	Max. Pressure	Outlet Size	Connection Type	Body Material	Vacuum Pressure	Min. Pressure	Grade	Price (ex. VAT)
A	15A.3	1"	175 psi	1/2"	FNPT	Cast Iron	29 in. hg	5 psi	Grade 316	€229.41
B	38	1"	150 psi	1/2"	FNPT	Cast Iron	29 in. hg	5 psi	Grade 316	€633.90
C	15A	1/2"	175 psi	1/2"	FNPT	Cast Iron	29 in. hg	5 psi	Grade 316	€216.33
B	38.2	2"	150 psi	1/2"	FNPT	Cast Iron	29 in. hg	5 psi	Grade 316	€667.91
D	48A	2"	150 psi	1/2"	FNPT	Cast Iron	29 in. hg	5 psi	Grade 316	€1,237.78
D	48A.2	3"	150 psi	1/2"	FNPT	Cast Iron	29 in. hg	5 psi	Grade 316	€1,347.46
E	15A.2	3/4"	175 psi	1/2"	FNPT	Cast Iron	29 in. hg	5 psi	Grade 316	€209.39
D	48A.3	4"	150 psi	1/2"	FNPT	Cast Iron	29 in. hg	5 psi	Grade 316	€1,627.93

VAL-MATIC -

Air Vacuum Valves

Style	Model	Inlet Size	Outlet Size	Connection Type	Body Material	Vacuum Pressure	Min. Pressure	Max. Pressure	Grade	Price (ex. VAT)
A	101ST	1"	1"	FNPT	Cast Iron	29 in. hg	5 psi	300 psi	Grade 316	€854.81
A	100ST	1/2"	1/2"	FNPT	Cast Iron	29 in. hg	5 psi	300 psi	Grade 316	€738.39
A	102ST	2"	2"	FNPT	Cast Iron	29 in. hg	5 psi	300 psi	Grade 316	€1,434.07
A	103STK	3"	3"	FNPT	Cast Iron	29 in. hg	5 psi	300 psi	Grade 316	€2,103.51

VAL-MATIC -

Air Release/Air Vacuum Valves

Style	Model	Inlet Size	Outlet Size	Max. Pressure	Connection Type	Body Material	Vacuum Pressure	Min. Pressure	Grade	Price (ex. VAT)
A	201C.2	1"	1"	300 psi	FNPT	Cast Iron	29 in. hg	20 psi	Grade 316	€865.38
A	202C.2	2"	2"	300 psi	FNPT	Cast Iron	29 in. hg	20 psi	Grade 316	€1,256.16
B	801A	2"	1"	150 psi	FNPT	Cast Iron	29 in. hg	20 psi	Grade 316	€2,347.39
B	802A	2"	2"	150 psi	FNPT	Cast Iron	29 in. hg	20 psi	Grade 316	€3,292.44
A	203C.2	3"	3"	300 psi	FNPT	Cast Iron	29 in. hg	20 psi	Grade 316	€2,719.31
B	803A	3"	3"	150 psi	FNPT	Cast Iron	29 in. hg	20 psi	Grade 316	€4,252.74
A	204C.2	4"	4"	300 psi	FNPT	Cast Iron	29 in. hg	20 psi	Grade 316	€3,612.55

PLAST-O-MATIC -

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

Model	Item	Price (ex. VAT)
ARV150VS-PV	CT7VAQ	€601.86

MARTINS INDUSTRIES -

Safety Release Valve, 130 psi Pressure

Model	Item	Price (ex. VAT)
SP-0043	CE8PWZ	€32.07	RFQ

MARTINS INDUSTRIES -

Safety Release Valve, 155 psi Pressure

Model	Item	Price (ex. VAT)
SP-0083	CE8PYK	€32.07	RFQ

MARTINS INDUSTRIES -

Safety Release Valve, 120psi Pressure

Model	Item	Price (ex. VAT)
SP-0084	CE8PYL	€31.36	RFQ

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.