Direct Acting, Normally-Closed PTFE Bellows Seal Solenoid Valves

True Blue^® Solenoid Valves Series EASMT & EASYMT for pressure, drain, and vacuum service; designed for all types of aggressive chemicals, salt solutions, acids, caustics, and ultrapure liquids such as deionized water.

    Features:

• 1,000,000+ cycles tested under laboratory conditions; some applications report over 2,000,000 cycles in field use. Your results may vary.
• No metal parts in wetted area.
• Rugged molded construction.
• Patented Fail-Dry^® vented design.
• Resistant to atmospheric corrosion.
• PTFE bellows design eliminates the problems often encountered with highly aggressive chemicals, also eliminates the need to have multiple types of valves on hand.
• Molded corrosion-resistant coil assembly.
• IP-54/Nema 4 water and dust tight enclosure.
• All valves are individually inspected and 100% tested.
• Optional coil connector light indicates when valve is energized.
• Supersedes Series EASM, EASYM, EASMD & EASYMD.

Mode of Operation:

Normally closed (energize to open). No pressure differential required.

Service:

Pressure, drain, and vacuum. (must specify with order). Please note that the 1" EASMT is only rated to 15" of mercury (partial vacuum). All others rated to full vacuum.

Handling of Dry Chlorine & Use of Thermoplastic Valves: When ordering a valve for chlorine service, please specify "Chlorine-Vacuum" on the order.

Plast-O-Matic Valves are not recommended for use with pressurized dry chlorine gas.

Application:

Series EASMT and EASYMT automatically shut off flow of highly corrosive and ultra-pure liquids. They can handle acids, caustics, solvents, chlorine solutions, sodium solutions, deionized water, reverse osmosis water, brewery processes, etc. and do not require pressure to aid in opening the valve.

Design:

Valves are spring return normally closed and direct acting with a heavy duty push-pull plunger design. There is no minimum pressure required for operation. The PTFE bellows shaft seal eliminates the need for an elastomer seal which can weaken as a result of chemical attack. Provides low friction sealing, non-sticking operation, and million cycle design. The bellows design also allows a stock valve to be used for vacuum or pressure. A poppet seat ensures bubble-tight shutoff.

Available in 1/2", 3/4", and 1" sizes (EASMT) or 1/4" and 1/2" (EASYMT). The EASMT has a larger orifice, which permits higher flow with a slight reduction in pressure rating. The EASYMT has a slightly smaller orifice (.375") and offers higher pressures at the expense of flow. Even so, the 1/4" EASYMT has a Cv rating of 1.1, which is still outstanding.

After 1,000,000 cycles, we recommend that the valve be disassembled and inspected. It is also recommended to replace the elastomer seals and bellows at this point. Contact your distributor for a seal kit. For heavy use applications, you may wish to order a spare seal kit with the valve. Seal replacement takes but a few minutes with common tools; no special training is required.

Dimensions:

Specifications:

   NOTES:

1. The pressure ratings shown in the table are maximum values. The valve will open at the maximum listed inlet pressure and it will close at the maximum listed back pressure. The valve may not operate properly, however, when the maximum inlet and back pressure values are used at the same time. Refer to chart, Pressure Ratings & Flow Rate Considerations, below.
2. Model #s show Viton seals. For EPDM, change "V" to "EP".
3. Model #s show W20 or G58 coil; for explosion proof coils, change W or G to E. For general-purpose 20 watt coil, change W to G.
4. Inlet pressure ratings for G20 & E20 coils are 25% less than W20.
5. All model numbers must be completed with body material suffix; see below.
6. Valves above rated for full vacuum EXCEPT for 1" sizes, which are rated to 15" Hg.
7. 20 watt coils are continuous duty. 58 watt coils are intermittent duty.
8. 20 watt coil available with 24V DC for EASYMT and EASMT4, with no reduction in inlet pressure.
9. .452 orifice on 1" size is a higher pressure, lower Cv option.
10. Any questions? Please contact our Tech group at (973) 256-3000 8-6 M-F EST. They will absolutely take your call (we have no voicemail!) and help you, regardless of how simple or complex the problem.

Pressure Ratings & Flow Rate Considerations

The pressure ratings shown in the table above are maximum values. The valve will open at the maximum listed inlet pressure and it will close at the maximum listed back pressure. The valve may not operate properly, however, when the maximum inlet and back pressure values are experienced at the same time. The governing parameter is velocity in feet per second (ft/sec) through the valve. Velocity is determined by pipe size and flow rate. To determine if your application exceeds the velocity tolerances for this valve, refer to the chart below.

Flow Rate and Equivalent Velocity
Valve Pipe Size	Flow Rate at  5 feet per second velocity	Flow Rate at  10 feet per second velocity
0.50" (½ in.); NPT/BSP	3.4 GPM 17.4 LPM	6.8 GPM 34.8 LPM
0.75" (¾ in.); NPT/BSP	6.4 GPM 32.7 LPM	12.8 GPM 65.4 LPM
1.00" (1 in.); NPT/BSP	10.8 GPM 55.2 LPM	21.6 GPM 110.4 LPM

If your flow rate (in Gallons Per Minute or Liters Per Minute) is below the 5 ft/sec column for your pipe size, the velocity is within plastic piping industry standards and the valve will function properly.

If your flow rate indicates a velocity above the accepted standard of 5 ft/sec but less than 10 ft/sec, Plast-O-Matic does not guarantee proper operation. The valve may still function, but if it emits a chattering sound, discontinue use. At fluid velocities above 5 ft/sec you must consider water hammer in the system design.

If your flow rate is higher than that listed in the 10 ft/sec column for your pipe size, this valve must not be used in your application.

Ordering Information:

Note: For complete information request catalog page.

EAS  (Y)    MT   2        EP       14         W20  - PV (Specify Voltage)

     Y-Reduced    Size     Seals    Orifice    Coil   Body Material

     Orifice      2=1/4    EP-EPDM  12-0.375   G20    PV-PVC (Geon®)

     1/4-1/2      4=1/2    V-FKM    14-0.452** W20    CP-CPVC (CORZAN®)

     sizes        5=3/4             16-0.500   E20    PP-Polypro(20% Glass Filled)

                  6=1               22-0.656   G58    PF-PVDF (Kynar®)

                                               E58

**This orifice size is an OPTION for the 1" size valve body. It allows higher inlet pressure with the W20 NEMA 4X coil, at the expense of Cv.
NOTE: Optional body and seal materials are available, depending on specifications, lead time, and quantity.

Helpful Links:

Tech Brief: Considerations of Piping Volume and Velocity when specifying Solenoid Valves

Tech Brief: Use of Chlorine with Thermoplastic Valves

PDF file of the complete catalog for the valves shown on this page, series EASMT & EASYMT [PDF file]

Determining Amperage for a Plast-O-Matic Solenoid Valve This is a technical document in Microsoft Word format that explains how to calculate the amperage required for Plast-O-Matic AC or DC coils.

Overview of the Entire Solenoid Valve Line, which may be the page you were on prior to this one. Provides key items for quick comparison and selection.

Series EAST, Compact valve with outstanding performance. Uses PTFE bellows dynamic seal, 1/4" & 1/2" sizes.

Series PS, Pilot-operated valve with outstanding pressure and flow performance. Uses PTFE bellows dynamic seal. Complete sizes 1/2" through 3", requires 5 psi differential for proper operation.

Series EASY-NO, Normally-open, direct acting valve in 1/4" & 1/2" sizes.

Series THP, Compact 3-way (aka diverter) solenoid valve.

Series WCM, Compact, direct-acting 2-way valve with stainless steel & silver wetted core. (this is the only Plast-O-Matic solenoid valve with a wetted metal core). Offers an outstanding combination of price and performance.

Series EASMD & EASYMD, earlier rolling diaphragm design; subsequently superseded by the EASMT & EASYMT above. Link is provided for reference only.

Series EASM & EASYM, earlier u-cup seal design; subsequently superseded by the EASMT & EASYMT above. Link is provided for reference only.

Pressure Drop Calculator How will a particular solenoid valve affect the pressure in your piping system? If you know your approximate flow rate in gallons per minute, this calculator will tell you your pressure drop, or "Delta P."

Additional Info: Catalog MSVT

Top of Page

Viton® is a registered trademark of DuPont Dow Elastomers, Geon® is a trademark of the Geon Co.,
Kynar® is a registered trademark of Atofina., Corzan™ is a trademark of Noveon

; and TRUE BLUE® are registered trademarks of Plast-O-Matic Valves, Inc.

DID YOU KNOW that the Series EASMT & EASYMT depicted on this web page are a direct descendant of the original solenoid valves offered by Plast-O-Matic Valves, Inc. four decades ago? Those original valves, Series EAS and DAS (an angle-pattern version) were designed by company founder Bruce L. DeLorenzo (1936-1999), one of the true pioneers of the plastic piping industry. This longevity is a tribute to Mr. DeLorenzo's foresight and engineering acumen. Today, the Engineering Department at Plast-O-Matic carries on the tradition of design excellence and attention to detail, and continue to seek ways to improve the existing products.

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