ESS12AC Valve Data - AAA Products International

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

Data for ESS12AC

The ESS12AC 24VDC is a 1-1/2" NPTF side ported, 2 position, double solenoid operated valve with a side exhaust nut on the solenoid stem. The valve is controlled by a smaller 3/8" subplate style attached to the top of the larger valve. The spool is shifted by 25 to 115 psi internal pilot air derived from pressure in port 1 when the solenoid is energized. The control spool is returned when the solenoid is de-energized and the opposite solenoid is energized. See additional information on solenoid valve operation. Coil and operator are only available in 24VDC intrinsically safe and must be used with a compatible barrier.

Details

Pressure: 25 to 150 psi on the main body of the valve when solenoid is internally piloted.
Vacuum: The valve cannot be vacuum operated when the solenoid is internally piloted.
Temperature: -20°F to 120°F ambient. 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: Buna-N in main valve, Viton in control valve.
Solenoid Seat: Viton.
Materials: 356-T6 aluminum body aluminum body, hard anodized aluminum spool, A380 aluminum end caps, Viton solenoid seat, composite gaskets, steel fasteners.
Flow: 1627 SCFM, 37.8 Cv
Repair Kits: ERKV-16 & ERKV-3.
3-Way or 5-Way: This valve is basically 4-way, it must be configured for external pilot (Option 'Z') for 5-way service by using ports 2 or 4 as an inlet, or 3-way service by plugging the unused port 2 or 4.
Fluid Media: Soft seal models are made for air, vacuum, and gases compatible with component materials. They should not be used with liquids.

"E-Series" Coil - Option A - Intrinsically Safe

When related to solenoid valves, intrinsic safety means that the coil's current draw and resulting temperature is held to such a low level (when used with an approved safety barrier) that the valve no longer has the capability of igniting a mixture of flammable or combustible material, either during normal operation or under fault conditions. Typically, they are used in situations where fire and explosive hazards exist due to the presence of flammable gases, vapors or liquids, combustible dusts or easily ignitable fibers. Intrinsically safe coils and operators are sold as a matched set and must be ordered as V-564 (individual components are not available). Solenoid operator maximum pressure is 115 psi.
These operators are equipped with the standard V-562 nut but can be ordered with a V-567W bronze muffler nut (option L) or a V-562 side exhaust nut (option C).
These 24 VDC coils are approved according to EN 50 020 respectively DIN VDE 0170/0171 part 5 for hazardous location. Class I, groups A, B, C and D; Class II, groups E, F and G; Class III. This coil is an ISO 4400 DIN style pin pattern. A non-indicator, cord grip style cap is provided. A copy of the certification is available here. An approved cap (included) must be used when connecting to an electrical source. The longer tab is the ground (earth). Either shorter tab can be connected to hot (+) and the other connected to neutral (-).

Material: Brass, steel, stainless steel, Viton seat.
Molding Material: Thermoset resin.
Ambient Temperature: -20°C to +50°C.
Internal Diameter Orifice: 0.8mm
Relative Duty Cycle: 100%.
Degree of Protection: IP65 with connector.
Certifications: This coil carries the following certificate of compliance. The rating only applies to the coil/operator and not the entire valve.
Insulation Class: F
Electrical Characteristics: 21.6 - 28 VDC

"E-Series" Intrinsically Safe Barrier

The proper use of the intrinsically safe solenoid operator requires the use of a barrier in the non-hazardous location with the solenoid operator in the hazardous location. We do not recommend nor endorse any barrier manufacturer or product but include a list to start your research. It is up to the user to verify barrier information. (Company and contact information may change.)
Barrier Schematic

COMPATIBLE BARRIER MANUFACTURERS

Pepperl & Fuchs Inc. - Telephone (330) 425-3555 - FAX: (330) 425-4607
Pepperl+Fuchs, Inc., 1600 Enterprise Parkway, Twinsburg, Ohio 44087
E-mail: sales@us.pepperl-fuchs.com - www.pepperl-fuchs.com
Models: KFD2-SLS-EX2 and KFD2-SD-EX1.36

Eaton
Process Safety Automation Measurement
www.eaton.com/us/en-us/products/process-safety-automation-measurement/intrinsic-safety
Model: MTL5525

STAHL, INC - Telephone: (800) 782-4357
R. Stahl, Inc.
13259 N. Promenade Blvd, Stafford, TX 77477
E-Mail: sales.us@r-stahl.com - www.rstahl.com
Model: 9275/10-24-48-11s

"E-Series" Nut - Side Exhaust

Side exhaust nut, part number V-562 reduces the noise and diffuses the solenoid exhaust. With this option the 10-32/5mm-0.8 tapped exhaust is inaccessible. To order standard solenoid valves with this nut, use option 'C' (e.g. ESY4C). For additional protection from dust/dirt incursion, use an O-Ring in the groove where the holes are located. The standard O-Ring size is AS-016, (ref 5/8 X 3/4 X 1/16) or order a V-565 Buna-N, 70 durometer O-Ring or V-411 Viton, 75 durometer O-Ring.

General - 1-1/2" & 2" Valve Operation

Normal assembly of all standard 1-1/2" & 2" valves is for internal pilot operation, in which the air pressure for shifting the large spool is internally tapped off the valve inlet. If the main spool is to handle pressures lower than 50 PSI or more than 150 PSI on solenoid models or from 50 to 250 psi on all other models, the valve should be factory ordered for "external pilot operation" by adding suffix "Z" after the regular model number. Or, the valve can easily be converted in the field to external piloting as described below. This pressure limitation applies to all 1-1/2" and 2" manual lever, solenoid, pilot or differential pilot valves.

Conversion to External Piloting: Remove the entire control valve from the main body and lay it aside. Install a 1/16"-27 NPT pipe plug in the treaded hole uncovered in the body mounting pad. Re-mount the control valve in the same orientation as before. Connect a pilot pressure air source (50 to 150 PSI on solenoid models and 50 to 250 psi on all other models) to the 1/4" NPTF external pilot port. This port is located on the side and near the top of the main body and stamped "EXT P", on the side opposite the MFC flow controls.

INTERNAL OPERATION
2 POSITION VALVES

EXTERNAL OPERATION
2 POSITION VALVES

INTERNAL OPERATION
3 POSITION VALVES

EXTERNAL OPERATION
3 POSITION VALVES

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.

General - O-Ring Information

Unless otherwise specified, all 1/4" and 3/8" soft seal valves come standard with Viton O-rings and all 1/2", 3/4", 1", 1-1/2" and 2" soft seal valves come standard with Buna-N O-rings. If a different material is required, use the dash numbers following the basic valve numbering code. For example, model RY3G-2 will have Silicone O-rings installed for a low temperature application. On valves larger than 1" consult factory on availability of O-ring materials. Additional O-ring material information.

Dash No.	O-ring Description	Temperature Rating
-2	Silicone	-80°F to 400°F
-3	Viton for most aromatic gases	-20°F to 400°F, 600°F for short time
-7	Urethane, 70 Durometer	-65°F to 200°F
-9	Buna-N	-40°F to 250°F

We are constantly researching O-ring materials to evaluate performance and durability in the AAA valve product line. Above is a compilation of the most commonly requested O-ring materials and the associated dash number. If you have a particular application that requires an O-ring material that is not listed, please contact us. Since we utilize standard O-ring dimensions in our valves, we can respond to the most obscure O-ring material request.