Page 13 - Peter Paul 2019 Catalog

Shown here are samples of manifold, manifold mounted valves can save space, reduce potential leakage, cut installation time, and reduce costs over their line-mounted counterparts.
Selecting the type of valve, function, port configuration, body material, and orifice size addresses the fluid, or wetted, portion of the valve. The exterior of the valve addresses the housing configuration.
Opportunities in Energy Savings
Peter Paul has developed several lines of valves to meet today’s demands for economy of space and energy consumption. For hazardous locations, Peter Paul’s UL ap- proved, low watt, miniature Series 50 EW hazardous location valve offers minimal space and energy requirements (only 5 W AC or DC) in volatile environments. This valve is the small- est hazardous location solenoid, with the best ambient and high temperature ratings on the market. A NEMA 4 rating is standard. The Series 50 EW miniature valve with encapsulat- ed coil also serves as a general-purpose valve for pneumatic and hydraulic conditions.
Series EL 50 (1.8 W AC or DC) and ELL50 (0.85 W DC) is a line of miniature explosion-proof general-purpose or safety valves for pneumatic and hydraulic applications. The versatility
of these valves accommodates the handling of hot air, hot water, refrigerants and many other media by the use of dif- ferent inserts.
Series ELW and ELLW are also UL approved, low watt, minia- ture hazardous location valves offering compact design and low energy requirements in volatile environments. The valves draw 1.8 W using AC or DC power, whereas the ELLW version draws only 1⁄2 W in from DC. This valve uses the smallest hazardous location solenoid, with the best ambient and
high temperature ratings on the market. A NEMA-4 rating is standard. The Series 50 ELW miniature valve with encapsulat- ed coil also serves as a general-purpose valve for pneumatic and hydraulic conditions.
What type of solenoid (coil) will be used, and where with it be located? Will a DC or AC coil be used, and at what voltage? How will the coil be connected to the electrical supply?
CONCLUSION
In summary, choosing a solenoid valve for any application requires evaluating several characteristic of the application. First, what fluid will be controlled, and what is it’s tem- perature, pressure and flow rate? Is a 2-way or 3-way valve needed, and should it be NO or NC? This will help determine what type and size valve should be specified. Will the valve be used in a potentially flammable, explosive, corrosive, or wet environment? What size piping will be used and at what orientation? What control voltage is available, and is the power AC or DC? How will the solenoid coil be connected to the control wiring?
Another important consideration is energy efficiency. Low watt valves can save substantial energy over their lifetime, making them a wise investment. They also produce little heat buildup, which can also be important, especially if multiple valves will be located within a single enclosure.
General purpose or safety valves for pneumatic and hydraulic applications, the Series 50 LW valve draws only 2.5 W using AC or DC power. Although not a safety valve, the Series 50 LLW valve draws only 0.65 W using DC. The versatility of these valves is increased to include the handling of hot air, hot water, refrigerants and many other media, by the use of different seals.
General purpose or safety valves for pneumatic and hydrau- lic applications, the Series 50 SLW valve draws only 1.8 W using AC or DC power. Although not a safety valve, the Series 50 SLLW valve draws only 1⁄2 W using DC. The versatility of these valves is increased to include the handling of hot air, hot water, refrigerants and many other media, by the use of different seals.
Finally, although it is not considered a low-watt valve be- cause it requires 10 W power, the Series 20 Magnetic Latching Valve can be a super energy saver. That’s because it requires a 10-W switching signal for less than 1⁄2 second. In fact, this type of valve is often used in remote areas where continu- ous power may not be available or with battery-powered portable equipment where power capacity is limited. It is also valuable in equipment such as in medical and chemical analyzers, where coil heating from continuous application of power is undesirable. Magnetic latching valves are available in 2-way NC, 2-way NO, and 3-way NC configurations.
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