1. Material NBR: Nitrile rubber FKM: Fluoro rubber EPDM: Ethylene propylene rubber 2. Oil-free treatment The degreasing and washing of wetted parts 3. Symbol In the symbol ( ), when the valve is closed, flow is blocked from port 1 to port 2. However, if the pressure in port 2 is higher than port 1, the valve will not be able to block the fluid and it will flow from port 2 to port 1. Pressure Terminology 1. Maximum operating pressure differential The maximum pressure differential (the difference between the inlet and outlet pressure) which is allowed for operation. When the outlet pressure is 0 MPa, this becomes the maximum operating pressure. 2. Minimum operating pressure differential The minimum pressure differential (the difference between the inlet pressure and outlet pressure) required to keep the main valve fully open. 3. Maximum system pressure The maximum pressure that can be applied inside the pipelines (line pressure). [The pressure differential of the solenoid valve portion must not exceed the maximum operating pressure differential.] 4. Withstand pressure The pressure in which the valve must be withstood without a drop in performance after holding for one minute under prescribed pressure and returning to the operating pressure range. [value under the prescribed conditions] Electrical Terminology Electrical Terminology 1. Apparent power (VA) Volt-ampere is the product of voltage (V) and current (A). Power consumption (W): For AC, W = V・A・cos θ. For DC, W = V・A. Note) cos θ shows power factor. cos θ . 0.9 2. Surge voltage A high voltage which is momentarily generated by shutting off the power in the shut-off area. 3. Degree of protection A degree defined in the “JIS C 0920: Waterproof test of electric machinery/appliance and the degree of protection against the intrusion of solid foreign objects.” Verify the degree of protection for each product. Second characteristic numeral IP First characteristic numeral �友irst Characteristics: Degrees of protection against solid foreign objects 0123456 Non-protected Protected against solid foreign objects of 50 mmo and greater Protected against solid foreign objects of 12 mmo and greater Protected against solid foreign objects of 2.5 mmo and greater Protected against solid foreign objects of 1.0 mmo and greater Dust-protected Dust-tight Example) IP65: Dust-tight, Water-jet-proof type “Water-jet-proof type” means that no water intrudes inside an equipment that could hinder from operating normally by means of applying water for 3 minutes in the prescribed manner. Take appropriate protection measures, since a device is not usable in an environment where a droplet of water is splashed constantly. �祐econd Characteristics: Degrees of protection against water 01 2 345678 . Series VX21/22/23 Glossary of Terms Others Faston Terminal 1. Faston. is a trademark of Tyco Electronics Corp. 2. For electrical connection of the Faston terminal and molded coil, please use Tyco’s “Amp/Faston connector/250 Series” or the equivalent. Dripproof type 1 Dripproof type 2 Rainproof type Splashproof type Water-jet-proof type Powerful water-jet-proof type Immersible type Submersible type Non-protected Protected against vertically falling water drops Protected against vertically falling water drops when enclosure tilted up to 15° Protected against rainfall when enclosure tilted up to 60° Protected against splashing water Protected against water jets Protected against powerful water jets Protected against the effects of temporary immersion in water Protected against the effects of continuous immersion in water 35