Definitions of key solenoid valve related terms
- Hex shaped plated steel or stainless steel part designed to attach the stop port on 2-way normally open and 3-way valves to a piping system using NPT threads. See literature for connection size.
- Ambient Temperature:
- Temperature of the media surrounding external surfaces of a valve.
- Ampere Rating:
- Current drain when the valve is energized.
- Bubble Tight:
- Sealing capability within the valve which is virtually undectectable during a pressure decay test time period. Approximately equal to 1X10-5 cc/sec using air.
- Burst Pressure:
- The pressure differential between internal and external surfaces of a valve which will cause the pressure containing parts to rupture resulting in an external leak.
- Cv Factor:
- A dimensionless coefficient or value which indicates relative flow capacity of a valve, defined as the gallons of water per minute (USGPM) at 60° F, which will flow through the valve at a one (1) PSIG pressure drop.
- Coil Insulation Class Rating:
- Coil magnet wire insulation rating. Exceeding this rating causes premature coil failure.
Class B: 130° C (266° F)
Class F: 155° C (311° F)
Class H: 180° C (356° F)
- Coil Voltage:
- Voltage at which the coil must be energized if the valve is to perform as stated in the specifications. Normally, the coil voltage tolerance is +10% to -15% of rated coil voltage.
- Continuous Duty:
- Coils rated for continuous duty are designed to be energized continuously without overheating or failure. All Solenoid Solutions Inc. standard valves are equipped with coils rated for continuous duty.
- No power applied to the coil. Typically, this is the "fail-safe" condition. A normally closed valve is closed when the coil is de-energized.
- Differential Pressure (delta P):
- Pressure difference between the inlet and outlet of a valve.
Examples:100 PSIG Inlet Pressure, 50 PSIG Outlet Pressure, Differential Pressure = 50 PSIG
120 PSIG Inlet Pressure, Atmospheric (0 PSIG) Outlet Pressure, Differential Pressure = 120 PSIG
50 PSIG Inlet Pressure, Vacuum Outlet, Differential Pressure = 65 PSIG (Assumes perfect vacuum)
Atmospheric (0 PSIG) Inlet Pressure, Vacuum Outlet, Differential Pressure = 15 PSIG (Assumes perfect vacuum)
- Direct Acting:
- In direct acting solenoid valves, the solenoid plunger directly opens or closes the orifice when the coil is energized or de-energized.
- Directional Control:
- Type of valve whose function is to divert a flow of media from one inlet line to one of two outlet lines.
- Duty Cycle:
- The ratio of "on" time to "total cycle" time. If a valve is on for 2 seconds and off for 8 seconds, the total cycle time is 10 seconds and the duty cycle is 20%.
- Power applied to the solenoid valve coil causing the valve to change state. A normally closed valve will open when energized.
- A device whose primary function is to remove contaminants from the flowing media. Solenoid Solutions Inc. recommends that a filter be placed directly before its solenoid valves.