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2 VALVES VAL-326 For further information www.norgren.com Adapter Hexagonal-shaped brass, stainless steel or plated leadloy part for attaching stop port on the valve to the piping system. Bubbletight A sealing capability within the valve which is undetectable during a 10-se- cond soap bubble test. Approximately = 2 x 10-3 cc/min on air. Burst Pressure The point at which pressure containing parts rupture or breakdown causing an external leak. Cv Value A value which indicates relative flow capacity of a valve, defined as the gallons of water per minute (GPM) at 60ºF which will flow through the valve with a pressure drop of 1 psi. Coil Voltage Voltage at which the coil must be energized if the valve is to perform as stated in the specifications. KIP coils are designed to operate at +10% or -15% of rated voltage. Continuous Duty A rating given a coil working under normal conditions that can be used continuously, without overheating or failure. De-energized No current is flowing through the coil. Return spring holds the plunger against the body orifice. A normally closed valve is de-energized in the closed position. Differential Pressure Pressure difference between the inlet line and the outlet line; i.e. 100 psig operating – 80 psig back = 20 psid. Energized Current is flowing through the coil. The magnetic flux resulting from electricity passing through the coil forces the plunger to pull up against the end stop. When a normally closed valve is energized, the valve opens and stays open until the electrical current stops. Heat Rise Difference between the temperature of the solenoid coil when de-energized and energized. KIP's standard coils are Class B construction (130ºC max. temperature). Total Temperature = Ambient Temperature + Internal Coil Heatrise (KIP's are 90ºC typically) If the ambient temperature were 70ºC, the total temperature would be 160ºC and the application would require a coil with Class H construction (180ºC max. temperature) as opposed to the Class B construction. Intermittent Duty A rating given to a coil whose heat rise is too high for continuous duty. By using the coil with minimum "on" time, the coil will not reach extreme tem- peratures which would cause the valve not to operate or to fail prematurely. MOPD (Maximum Operating Pressure Differential) The maximum difference in pressure, psi (lbs per square inch), between the valve inlet and outlet at which the solenoid can safely operate the valve. Media The material that passes through the valve ports. Typical media include air, gases, water, hydraulic fluids, petroleum products, corrosive and noncorro- sive liquids. Metering An adjustable pin which regulates the flow of media over a specified path; placed as a restriction in the media path. Orifice Openings within the valve which can be open or closed to control the passage of media. Oxygen Service Solenoid valves specified for use with oxygen require special cleaning and are furnished free of any oils or contaminants Port Openings through which media entering (inlet) and exiting (outlet) the valve flow into and out of the valve. Response Time The time necessary for a closed valve to fully open, or for an open valve to totally close. Response time is affected by voltage, pressure, size and media. The typical response time for KIP solenoid valves is 6 to 12 millise- conds. Shading Ring Usually, a ring of copper pressed into a groove machined in the endstop of all alternating current (AC) valves. The ring overcomes oscillation and chatter associated with AC valves. Other materials typically used are silver and aluminum. Key Terms