This product group is focused on valves for high-temperature
and high-pressure applications that support the energy infrastructure.
Taking pride in our role as a leading manufacturer of high-temperature & high-pressure valves
In the past, we specialized in providing valves for marine vessels, including the famed battleship Yamato. After the Pacific War, we sold many valves to the various industrial plants that would become the pillars of Japan’s reconstruction, including nuclear power plants, thermal power plants, and petrochemical complexes. Over the years and in the face of sweeping change, we continued to develop our valve business. Our product line has evolved to become a supply system for custom-made valves including general-purpose valves (such as globe valves, needle valves, gate valves, and check valves) as well as safety valves and relief valves with a focus on high-temperature and high-pressure applications. Among all the manufacturers of high-temperature and high-pressure valves in Japan, we have earned particularly high praise for the valves we supply to power plants and other industrial plants both inside and outside Japan. Our cast parts are manufactured at our Iga Plant in the city of Iga in Mie Prefecture, while our Head Office Plant in Amagasaki, Hyogo Prefecture undertakes the processing, assembly, inspection, and shipping of products. We take great pride in our track record both in Japan and around the world, and have a great deal of confidence in our manufacturing expertise.
|Valve Type||Valve Classication||For Nuclear Power Plants||For Thermal Power Plants/General Industries||Nominal Diameter(mm)||Applicable Pressure|
|Globe valve||Globe valve||Feedwater pump stop valve||Suitable for various purposes||15–600||150 Lb –
|Y-valve||High-pressure heater outlet check valve||Suitable for low-pressure-loss applications|
|Angle valve||Blowdown valve||Drain valve|
|Needle valve||Needle valve for high differential pressures||Feedwater pump stop valve||Main steam pipe drain valve||15–200|
|Angle needle valve||Continuous blow valve|
|Gate valve||Wedge gate valve||Fuel transfer pipe gate valve||Main steam stop valve||15–800|
|Parallel slide valve|
|Check valve||Lift check valve||Drain sampling check valve||Mainly applicable to smaller diameters||15–750|
|Swing check valve||Safety injection system check valve||Feedwater pump bypass check valve|
|Tilting check valve||Feedwater pump outlet check valve|
|Screw-down stop check valve||High-pressure water heater water supply outlet valve||Boiler water circulation pump outlet valve|
|Swing check valve with cylinder||Main steam isolation valve||Bleed check valve|
|Swing check valve with counterweight||Main steam check valve||Mainly for shock-absorbing applications|
|Safety valve||Open safety valve||Main steam safety valve||Drum safety valve Safety valve for marine vessels||40–200||0.1 MPa –
|Sealed safety valve||Pressurizer safety valve||High-pressure gas tank safety valve||100・150|
|Sealed relief valve||Residual heat removal pump inlet relief valve||High-pressure water heater relief valve||20–200|
Carbon steel, low-alloy steel, 9Cr steel, stainless steel (JIS, ASME and ASTM etc.)
Needle valve for high differential pressures
Wedge gate valve
Swing check valve
Tilting check valve
Swing check valve with cylinder
Open safety valve
Safety valve for marine vessels
Sealed relief valve
Special valves Nominal diameter appears in parentheses.
(1,000 mm minimum)
Through conduit valve
Electromagnetic relief valve (PCV)
Moisture separator & reheater safety valve
Vacuum relief valve
Unique world-leading technology for specialized
and large-scale steel castings
Cast steel products represent TVE’s flagship business segment.
The Iga Plant in Mie Prefecture, one of Japan’s leading large-scale casting facilities, manufactures not only our castings but also various specialized and large-scale cast steel products. It provides cast steel products of uniform quality using materials — such as 9Cr steel and ultra-low C stainless steel — that require advanced production technologies. As a result, this plant boasts advanced manufacturing technologies and world-leading equipment.
As a professional in steel casting technology, we propose needed solutions right from the design stage.
Property Matrix of Applicable Steel Grades
The steel type that is actually used depends on the customer’s application. We have the capability to manufacture cast steel products to accommodate various requirements such as high pressure and high or low temperature.