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Swing Type Main Steam Isolation Valve As a main steam isolation valve for the PWR type reactor, this valve is provided at the outlet part of the steam generator, and is used to shut off the steam to prevent its release into the atmosphere at the time of an unforeseen accident such as breakage of the main steam pipe. The photo shows a example. Size 28 inch , 30 inch Working pressure / temperature 7.5Mpa / 291℃ Material JIS SCPL 1 ( similar to ASTM LC B ) Weight Approx. 68,647 N

Electric Motor Operated Wedge Gate Valve The valve body is cast stainless steel and bolted bonnet type. Valve operation is made by an electrical motor. For leakage prevention the valve has a lip sealing welded bonnet construction. Also, there are other types of welded seals such as an omega ring, or one having a double structure at the gland portion and provided with a leak off connecting pipe. The photo shows a example. Size 10 inch Class 1500 Operating press 17.2Mpa Temp 343℃ Material JIS SCS 14A （similar to ASTM CF 8M）

Safety Valve for Pressurizer This is a safety valve to be mounted with the pressurizer of the PWR type reactor; being a safety valve provided with high pressure bellows having the blowing‐off pressure of 17.2Mpa. This valve, indispensable for the protection of the pressurizer from overpressure, is always exposed to radioactivity, so that all parts are made of high quality stainless steel. The photo shows a example. Size 3 1/2 inch , 5 1/2 inch Popping Pressure 17.2Mpa Popping Temperature Saturated Temp. ( 353℃ ) Material JIS SCS 14A （similar to ASTM CF 8M）

Pressure Relief Valve With Pilot Valve This is a pressure relief valve to be used for the reheater ( moisture separator and cross-around) of large capacity turbines for both pressurized water (PWR) and boiling water reactors (BWR), having the blowing off pressure of 1.1 - 1.8Mpa, the inlet size of 16 inch ‐ 22 inch and characteristic of the large size. Popping Pressure 1.1 - 1.8Mpa Popping Temperature 195℃ ～ 286℃ Material JIS SCPH 2 （similar to ASTM WC B）