ASCO Solenoid Valves

Solenoid Valves

Solenoid valves are used to operate pneumaticactuators, acting upon electrical signals to admit andexhaust supply pressure to the actuator. Three-waysolenoid valves are generally used with spring returnactuators, and four-way solenoids on double actingactuators.

Solenoid valves manufactured by ASCO (AutomaticSwitch Co.) are regularly furnished with pneumaticactuators when ordered with solenoid valves.

When solenoid valves are ordered with actuators,they are assembled to the actuator and testedbefore shipment from the factory.

Solenoid Valves on Double Acting Actuators.Solenoid valves are normally mounted on doubleacting actuators to provide for ball valve closure onloss of electrical power. If valve opening is required,the solenoid valve will be mounted with the connec-tions reversed. Valves with double acting actuatorswill remain in place on loss of supply air pressure.

Solenoid Valves on Spring Return Actuators.Solenoid valves are normally mounted on springreturn actuators to provide for ball valve closure onloss of electrical power or supply air. If valve openingis required, the solenoid valve will be mounted withthe connections the same, but the actuator will bemounted on the valve with the valve in the openposition. This means that the valve will rotate clock-wise to open, counterclockwise to close, oppositethe normal convention. The pistons in the actuatormust be reversed at extra cost to convert the actua-tor to reverse rotation for the valve to rotate counter-clockwise to fail open. Reverse rotating actuatorsare required for control valves and certain multi-portvalve configurations to function properly.

More specific mounting information is given on page2 for NAMUR mount and page 3 for NAMUR mountand page 4 for nipple mount solenoid valves.

Actuator Information. Specific actuator informationcan be found in the UT bulletin.

Marwin Valve, a division of Richards Industries3170 Wasson Road • Cincinnati, OH 45209513-533-5600 • 800-543-7311 • 513-871-0105 (f)marwin@richardsind.com • www.marwinvalve.com

NAMUR (direct mount) solenoid valve on Marwin UTPneumatic Actuator

3-Way nipple (line) mount solenid valve on MarwinUT Spring Return Pneumatic Actuator

Marwin Valve

ASCO Solenoids

2

Recommended Solenoid Valves. The tables on pages 2 list the recommended solenoid valve for each MarwinUT actuator. NAMUR direct mount solenoids (Table 1) are standard for small and mid-size actuators (UT-0Athrough UT-5), but a nipple mount option is given (Table 2) for those cases where a NAMUR mount is not suit-able or not desired. Nipple mount solenoids (Table 2) are standard for large size actuators (UT-6 and UT-7)because of solenoid valve flow capacity (Cv) requirements for the larger actuators. The solenoid valves are sizedto provide the typical valve operating speeds cited in the UT bulletin. These generally range from 1 second on thesmallest actuators, up to 15 seconds on the larger ones.

Solenoid Valve Electrical Enclosures. Standard solenoid valve electrical enclosures are as follows:NEMA 4 – General purpose and watertight, meeting the requirements of Type 1, 2, 3, 3S, 4 and 4XNEMA 7 – Combination Explosion Proof and Watertight, meeting the requirements of 3, 3S, 4, 4X, 6, 6P, 7 and 9,

Class 1, Div. 1 (Groups A-D) and Class 1, Div. 2 Type 9 (Groups E-G).

Accessories. Accessories / options such as quick exhaust valves, speed control valves, mufflers / bug vents,special coil connections, manual operating, filter-regulator (FR), and filter-lubricator-regulator (FLR) are alsoavailable.

Ordering. To order a solenoid valve, simply choose the appropriate model and specify the required voltage andoption code (if given) from the tables on pages 2 and 3. For example, a standard NAMUR mount solenoid valvewith a NEMA 4 enclosure and 110 VAC coil for a UT-2-SR would be specified as WT8551A001MS (110 VAC)(code 3A).

Installation, Operating, and Maintenance Instructions

I & M's (Installation & Maintenance) instructions, including solenoid operated valve flow schematics, are shippedwith the products. They are also available on the Marwin website at www.marwinvalve.com.

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2438 yaw-4tnuoMelppiN 3R9136V 3R1227V

4438 yaw-4tnuoMelppiN 0775V 8R4856V

Note: Table lists revisions on ASCO web site as of November, 2005. Consult ASCO website atwww.ascovalvenet.com to ensure use of latest version.

Marwin Valve

Asco Solenoids

3

Speed Control Valves (SCV). Speed control valves are not recommended for ASCO 8551 solenoid operatedvalves (SOV) in the 3-way configuration; use nipple mount 3-way SOV's when SCV's are required (see Table 3).In the 4-way configuration, the SCV on the top (#3) SOV port controls CW actuator speed, and the SCV on thebottom (#5) port controls CCW speed.

Mounting. Use the M5 mounting bolts, which are the bolts in the package with the locating set screw and O-rings tobolt the 8551 to the UT actuator. UT-0A requires adaptor block 26-00002 between actuator and solenoid 5/2 plate.Mounted 8551 SOV's are furnished witha street elbow in the top exhaust port so it opens in a vertical plane toreduce entry of contaminants.

Mounting Orientation. ASCO 8551 SOV's are normally mounted to UT direct rotating actuators with the airsupply port down. Caution! Moutning the SOV with the port up affects the functioning of the actuator.Functioning for direct rotating actuators is as follows:

• DA UT Actuators – fail clockwise on loss of electricity and fail in place on loss of air (4-way SOV function using 5/3 plate).• SR UT Actuators – fail clockwise on loss of air or electricity (3-way SOV function using 3/2 plate).

The function is reversed for reverse rotating actuators. Closing action of the ball valve depends on whether it isopen or closed when the deenergized actuator is mounted on it. The closing action of normal 2-way ball valvescan be changed by the way the actuator is mounted on the valve, but control and 3-way ball valves require aspecific closing rotation direction for proper operating, and a reverse rotating actuator may be required for thevalve to function properly.

Port Seals. Port seals are standard size 016 NBR 70 O-rings and may be procured locally if those supplied withthe solenoid valve are lost.

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NAMUR (Direct Mount) Solenoid Operated Valves (SOV)

Marwin Valve

ASCO Solenoids

Mounting. Nipple mount solenoid valves are piped to the top or right port of spring return UT actuators. They arepiped to both ports of double acting UT actuators, with the connections depending upon the desired actuatorfunctioning. See the solenoid valve instructions and the UT Actuator bulletin and Installation and Maintenance (I &M) manual. Pressurizing the top or right port of direct rotating UT actuators produces CCW rotation, and pressur-izing the opposite port produces CW rotation.

Marwin reserves the right to make revisions to its product, specifications, literature and related information without notice. Please visit our website atwww.marwinvalve.com for the latest information on our products.

Marwin Valve, a division of Richards Industries3170 Wasson Road • Cincinnati, OH 45209513-533-5600 • 800-543-7311 • 513-871-0105 (f)marwin@richardsind.com • www.marwinvalve.com

ASCO Solenoid/1105

Nipple (Line) Mount Solenoid Operated Valves (SOV)

Note: For nipple mount solenoids without option code, specify the appropriate model from the "Description" column, and the requiredvoltage.

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53G7138

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