AAA Products International Inc.
7114 Harry Hines Blvd.
Dallas, Texas 75235
214-357-3851

Data for 221V

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The 221V is a 1/2" NPTF side ported, 2 position, spring return, differential pilot operated valve. The valve body is coated with TUFRAM® compound, e-nickel end caps and stainless hardware for improved corrosion protection. The internal spool is shifted by depressing the button bleeder installed in the 1/8" NPTF pilot port in the end cap of the valve. Once the button bleeder is depressed and the internal pressure is vented, the spring shifts the spool. When the internal pressure is greater than 50 psi, the spool will be fully shifted, compressing the spring. There is no consistent correlation between the amount of internal pressure and the amount of spool travel. The buttons can be remotely located. The response time of the valve shifting is dependent upon the distance from the button to the valve as well as the hose diameter used (smaller diameters allow faster response times).

Details

Dimension PDF Parts
Pressure: 50 to 250 psi on the main body of the valve.
Vacuum: Button bleeder valves cannot be used for vacuum service.
Temperature: -20°F to 250°F. Caution: If it is possible that the ambient temperature may fall below freezing, the medium must be moisture free to prevent internal damage or unpredictable behavior.
Mounting: The spool is friction positioned so the valve must be mounted with the spool in a horizontal orientation.
O-Rings: Viton.
Materials: TUFRAM® coated 356-T6 aluminum body, hard anodized aluminum spool, e-nickel aluminum end caps, composite gaskets, stainless steel fasteners. The button bleeder is half hard brass with a stainless steel button.
Flow: 215 SCFM, 5.0 Cv
Repair Kit: ERKV-4-3 & two ECG48-3 gaskets.
3-Way: While this valve is basically 4-way, it can be used for 3-way service by plugging the unused port 2 or 4, port 1 must remain pressurized to create the differential pressure required to shift the spool.
Fluid Media: Soft seal models are made for air, vacuum, and gases compatible with component materials. They should not be used with liquids.
221V
221V
221V Flow Symbol
221V Flow Control

TUFRAM®

A special surface process called TUFRAM® can be applied to all aluminum and aluminum alloy parts giving them enhanced surface properties. These properties include improved corrosion resistance, abrasion resistance, chemical resistance, moisture resistance, increased hardness, USDA-approved and FDA-approved. This process is ideal for AAA valves that are used in very harsh environments. For example, wash down areas in food processing plants that use caustic solutions for clean-up, off shore oil platforms that are subject to salt water spray, chemical processing plants or valves that must mount outdoors. Please contact us for more information on the use of TUFRAM® L-4 on your application.
Tufram Information

General - Installation & Maintenance

Valves should be installed with reasonable accessibility for service. Exercise care in keeping tubing lengths to a minimum. Plumbing should be free of contamination. Pipe joint compound should be used sparingly applied only to the thread, never the valve body. Over tightening of pipe threads can fracture the joint causing leaks or failure. Protect the valve from exposure to extreme temperatures, dirt and moisture to maximize life.
Bulletin A-113: Operating & Maintenance Instructions.
Installation: Valve Fitting Installation.

⚠ WARNING:These products can expose you to chemicals which is(are) known to the State of California to cause cancer or reproductive harm. For more information, go to www.P65Warnings.ca.gov. Contact us for specific chemicals or materials used in a product.

General - Lubrication, Standard

All valves are pre-lubricated at the factory using Magnalube-G Teflon based all purpose grease. Valves are suitable for, and perform best in a non-lube service. For long life, use an air line filter/lubricator installed no further than 10-ft. from the valve. The filter should be rated 25 pm or finer. Use a good grade of petroleum base lubricating oil no heavier than SAE 10W. DO NOT OVER-LUBRICATE. This could cause the spool to stick. CAUTION! Do not use questionable fluids in air line lubricators. Do not use petroleum oil with detergent additives. Detergents, volatile or aromatic fluids may swell rubber seals in valves and cylinders. Never use cooking or vegetable oil as a lubricant. When cleaning AAA valves after extended service, lubricate the valve spool with AAA high film strength grease, or, use O-ring grease which is usually available from supply houses which sell O-rings. Magnalube-G is included in all valve repair kits for proper valve maintenance. If an additional amount of Magnalube-G grease is required, a 0.75 ounce tube is available under part number VGK-3. Never use any kind of oil, cup grease, or automobile chassis lubricant.

The shelf life of Magnalube-G regularly lasts for 10+ year intervals in closed packaging due to the extremely long operating life of the Elastomer-PTFE gelling agent and premium parafiinic mineral base oil. If the valve is stored for over 2 years, then a small reapplication of grease is suggested.

Magnalube-G Technical Document
Magnalube-G MSDS Document

An alternative grease for low temperature application, refer to Dow-55 grease.

AAA Products International