General Specifications for Solenoid Valves

• Coils - All Spartan solenoid valves contain a completely nylon encapsulated magnetic circuit. The bobbin windings have a class F insulation rating or 390F. For the DIN spaded version, each connector tab is silver plated to assure excellent conductivity. Each coil is fastened to the plunger guide tube by means of a hold down nut for ease of change over without interrupting the pneumatic circuit.
  
  
• Armature Assembly - All Spartan armature assemblies are constructed of metallic components designed to provide protection against incompatibilities of various fluid medias. However it is necessary to use caution when specifying solenoid valves for an unfamiliar fluid. Some basic materials are: All plungers and pole pieces - 430F Stainless Steel. Plunger guide tubes - brass standard for 2500, 3800, and 3900 Series. 303 stainless steel for Series 4000. All springs - 316 Stainless Steel. Types of sealing materials - Nitrile standard for 2500, 3800, and 3900 Series, Viton standard on all Series 4000 operators and valves. Other seal materials are available upon request. Use caution when selecting a material suited specifically for the media.
  
  
• Valve Bodies - Standard valve body material for Series 2510,3822, and 3900 is aluminum. Other body materials are available upon request. Series 4200 valves use a Zamak die cast material as standard. Other materials such as brass and 316 stainless steel are available and are stocked items in most cases depending on the orifice size selected. Again, it is suggested to use caution in selecting a body material for unfamiliar media. Series APV10, 4500 and 4520 bodies are available only in bronze. Series 3823, 4280, 4510 bodies are constructed of DuPont Zytel material which is approved for potable water applications. Series IRV and 4600 bodies are made of glass filled nylon. Series APV30 body is E-nickel plated brass or 316 stainless. Series 4610 body is composed mainly of bronze and glass filled nylon. Series APV20 body is available in brass.

Temperature Considerations - Spartan solenoid valves are manufactured to operate with fluids at a maximum of 90C (194F) max., and an ambient temperature range of -10C to +50C. (+14F to +122F). Other temperature limits can be supplied upon request for special applications.

Response Times - With Direct-Acting solenoid valves, the response time is measured from the moment of electrical energizing to the point when a figure of 90% of the pressure rating is attained at the valve outlet. The small moving masses and relatively high magnetic forces involved means that rapid response times, mostly in the region of 10 to 20 milliseconds are obtained. The response time for an internally piloted valve is determined by the size, design, operating function, fluid media, temperature, inlet pressure and pressure drop. Most Spartan valves have a response time range from 20 to 80 milliseconds.

Pressure Range - Spartan solenoid valves will work reliably within the pressure ranges as shown in the catalog. The data is valid for a voltage band from -10% to +10% of nominal rated voltage. When a 3-way valve is used for a function other than that which it was supplied, the permissible pressure range is altered. DC voltage valves operate at a lower maximum pressure than AC counterparts. Pressure ranges listed in the catalog are for DC voltages.

Flow Rates - The flow rate through a valve is basically determined by the nature of the design and flow path through the valve. The size of the valve required for a particular application is generally established by the Cv flow factor. The Cv Flow Coefficient is defined as "the number of gallons per minute of water which will pass through a given flow restriction with a pressure drop of 1 PSI". In most cases, the size of a valve can be determined graphically given a few known factors: gallons per minute, cubic feet per minute, pressure drop, inlet pressure, outlet pressure & Cv coefficient.