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Breather Valve TA330 |
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Meets SAE Specification AS27166 & MIL-DTL-27166 |
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The TA330 Breather Valve has the same performance characteristics as the TA333-R Pressure Relief Valve, except it does not have a manual release push button. It is ideal for pressure relief applications or situations where a manual release feature is not wanted. The TA330 has separate and distinct settings for both pressure and vacuum relief. It has a flow rate of 1.5 to 4.0 scfm at 1.5 psi above the valve reseal setting. The lower the setting, the higher the flow rate. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
The TA330 Breather Valve is tamper-proof and requires no field maintenance.
Corrosion-resistant materials are used throughout. The valve seal is made of
silicone rubber. The spherical valve seat is Teflon coated
for easy "break-away" action even after prolonged storage. Gasket,
washer and hex nut for mounting are provided with each valve. A
weldable nut is available for use as a threaded boss, or the
valve may be used with our 658800 Mounting Flange. RFI/EMI shielding is also available. For additional enclosure protection, AGM can develop a custom desiccant cartridge that mates with the valve. The TA330 valve is offered in two types: “Cracking” and “Reseal”. Cracking valves are rated by cracking pressure (the pressure at which the valve has opened enough to flow 1 cubic centimeter per minute) and the flow rate at 1.5 psi above the cracking pressure. Reseal valves are rated by reseal pressure (the pressure by which the valve is guaranteed to close after it has cracked open) and the flow rate at 1.5 psi above the reseal pressure. Note that whether you are specifying a reseal valve or a cracking valve, the flow rate at 1.5 psi above the reseal pressure is usually the most important parameter when selecting a valve: per SAE Specification AS27166, you should select a valve with a flow rate of at least 12% of the container volume per minute at a pressure less than the container’s pressure rating. For instance, when choosing a valve for a container with a volume of 10 cubic feet that can withstand a pressure of 2 psi, the recommended valve would flow 1.2 standard cubic feet per minute (SCFM) at 2 psid or less pressure differential. While at first glance it may appear that a valve with a crack point of 2 psi would be appropriate for this application, remember that the flow rate at crack is very low (1 cc/min) and therefore would very likely not provide adequate pressure relief. Refer to Theory and Characteristics for more information on selecting a breather valve. Flow rate versus pressure curves are available for some valves. Contact AGM’s Engineering Department if you require this information. Materials and Finish: Housing, nut and washer are aluminum with anodized finish. Gasket material is silicone per A-A-59588, Class II, Grade 60. Torque value for installation: 30 in. - lbs. (3.4 N•m) Weight: .10 lbs. (45 grams) Mounting Requirements: Gasket, washer and hex nut for mounting are provided with each valve. A weldable nut is available for use as a threaded boss, or the valve may be used with our 658800 Mounting Flange. Contact AGM's Engineering department for information on NEMA and IP ratings.
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