KITZ stainless and high alloy steel valves are widely utilized in Chemical, Petrochemical, food and beverage, pulp and paper, Pharmaceutical and other industrial processing plant through the world.
Stainless & high alloy steel valves
Corrosion Resistance of KITZ Stainless and High Alloy Steel Valves
KITZ stainless and high alloy steel valves are designed, manufactured, and inspected to strictly conform with the requirements of ASTM, ASME, API, BS, JIS and other internationally recognized standards, with all quality elements meeting the critical service conditions needed for corrosive industrial applications.
KITZ stainless and high alloy steel valves are characterized by unsurpassed corrosion resistance and reliability, providing users with the lowest cost of ownership and the longest total life cycle performance in the industry. As an ISO 9001 certified valve manufacturer, KITZ Corporation has achieved a high degree of product standardization by the ideal combination of its updated technical know-how and uniquely integrated system of production adopted at its Nagasaka Plant, Yamanashi, Japan, the home of KITZ stainless and high alloy steel valves.
Electronically controlled steel foundries, multi-station transfer machining systems and state-of-the-art test and inspection facilities, are all put together at KITZ Nagasaka Plant, to ensure the quality and reliability of all products that it releases to the global market.
Features of Austenitic Stainless Steel as Valve Material
Stainless steel is divided into three main categories depending on its chemical composition. They are martensitic stainless steel containing 13% chromium, ferritic stainless steel containing 18% chromium, and austenitic stainless steel containing 18% chromium and 8% nickel. Among them, austenitic stainless steel is widely used for both valve shells and trims, which require high pressure resistant characteristic. Martensitic stainless steel is used mainly for trims of carbon steel valves. The features and characteristics of these stainless steels are compared below:
Features of Stainless Steel by Types
| Types | Martensitic | Ferritic | Austenitic |
|---|---|---|---|
| Typical Material | AISI 410 | AISI 430 | ASTM CF8M/F316 |
| Magnetization | Yes | No | |
| Hardening by heat treatment | Yes | No | |
| Hardening by machining | Same as soft steel | Less | |
| Corrosion and acid resistance | Good | Excellent | |
| Impact resistance and elongation | Good | Excellent | |
| Weldability | Poor | Fair | Good |
| Lowest service temperature | -29°C | -10°C | -269°C |
As shown below, austenitic stainless steel has an excellent impact value in subzero temperature range and been almost exclusively used for cryogenic service applications. It also features higher heat resistance than carbon steel. Its tensile strength is also superior to other valve materials and its high resistance against destructive tensile load in a wide range of service temperatures is unrivaled by other valve materials. Corrosive fluid cannot generally affect these excellent mechanical properties of austenitic stainless steel.
On the other hand, austenitic stainless steel is known as a very mild metal having no effect on the quality of the materials it comes into contact with. Line fluid is not contaminated while traveling through austenitic stainless steel pipelines. This advantages makes austenitic stainless steel valves the important fluid handling media for food, beverage and pharmaceutical processing plants. In addition, austenitic stainless steel CF8M or F316 has higher resistance to sea water erosion and is widely used for the valves installed in seawater disalination plants, offshore exploration facilities and ocean structures.
Bellows Valves
The gland section is protected by a double seal of molded bellows and gland packing, so there is no external leakage.
No stem leakage
The stem area is sealed double with a formed multi-ply bellows and gland packing, which completely prevent stem leakage of toxic fluids.
Saving manufacturing costs
No loss of the line fluid through stem area will increase your productivity.
Wide range of applications
With high corrosion resistant valve bodies made of austenitic stainless steel and leak-free stem design, valves are almighty to handle toxic or inflammable fluids, steam and heat transfer media, as well as vacuum service.
Easy maintenance
Gland retightening and packing replacement are not required, minimizing troublesome maintenance works.
Protection of the quality of line fluids
Fluids are not in direct contact with an atmosphere, and protected from the contamination caused by foreign objects.
Lower operation torque
Since gland retightening is not required, stem rotation is not disturbed with the load of gland packing. Thus valves can be operated with minimized torque.
Cautions
- Take appropriate preventive measures when freezing is expected.
- Protect valves from impact pressure, such as water hammer.
- DO NOT install valves where excessive vibration is expected.
- Take appropriate measures to protect bellows from highly viscous or solidifiable fluids.
Related products
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Ball Valves
Ball valves, one of KITZ's main products, offer a lineup of valves compatible with a variety of materials. We also produce metal seats that support special lines and can handle operating temperatures up to 500°C, as well as Λ (lambda) port valves that can be closed and controlled to accommodate slurry fluids. We apply standards such as ANSI/ASME and API,MSS,ISO,DIN,JIS to supply worldwide.
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Butterfly Valves
KITZ offers a variety of butterfly valves in combination with body materials and seats to meet customer needs.
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Gate, Globe, Check Valves and Strainer
Various valves are available in a wide range of applications, including gate valves, which can be manufactured in a wide variety of sizes, have a wide range of material options, and have a wide range of pressure and temperature response ranges, globe valves, which have a shorter opening and closing time than gate valves and can change flow characteristics with a jisk shape, check valves that constantly maintain fluid flow in a constant direction and prevent backflow, and strainers for removing foreign matter from fluids. Information on gate valves, globe valves, and check valves can be found in most catalogs for each material.
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Actuated Valves
Electric open/close operation actuators that can be mounted on ball valves and butterfly valves are available. The actuator body is made of aluminum die-cast and the reduction gear is made of planetary gears, making it lighter and more compact.
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PFA-lined Ball valves (UTBLN Series)
PFA exhibits excellent properties as a lining material, while having heat and chemical resistance and mechanical properties equal to or higher than those of PTFE.
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Floating type Ball valves (TDZ series)
This floating ball valve complies with international standards. Completely compliant with ISO17292, API608. Has the high performance required for severe service of the plant process. The mounting dimensions of the drive are ISO 5211 and CAPI and are compatible with drive units worldwide. Compliant with CE-mark based on PED 2014/68/EU.
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Floating type ball valve (General flange type)
Floating type ball valve with flange type connection. A wide variety of materials are available depending on the application. It is equipped with an anti-static, stem pop-out, locking device, etc.
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Λ port ball valve
This valve is structured so that the edges of the Λ characters are formed by the squeegee, and the flow rate is adjusted at the intermediate opening, and foreign matter in the liquid can be cut off while closing it by adopting a metal seat. Suitable for controlling special fluids such as paper, pulp, slurry, clay bodies, etc.
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“Filltite®” Special seat ball valves for high temperature
Specially seats with high proportions of carbon-based fillers in PTFE to improve heat resistance and wear resistance. Even at temperatures as high as 300°C, it exhibits excellent operability, durability, chemical resistance, and sealing performance with little permanent deformation.
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Carbotite seats and ball valves for high temperatures
Carbotite Seal Ball Valves are ball valves that develop carbon for use in ball seats, and are capable of withstanding a maximum operating temperature of 500°C.
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Stainless steel/carbon steel metaball valves
High sealing performance has been realized by high true sphere machining of the bar sphere and lapping of the seat surface. Can handle powders, slurries, viscous fluids, and high-temperature fluids that are difficult to handle with soft seat.
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Ball Valves for Low Temperature services
-46℃ for the TDZ series of carbon steels. For the stainless-steel UTDZ series. Compatible with low temperatures down to -104°C.
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Ball seats
The HYPATITE® PTFE is a seat for ball valves developed by KITZ.
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Trunnion mounted ball valves (for pipeline)
This is an industrial trunnion ball valve with a three-pace structure. Covers ASME, API standard.
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Automatic valve with pneumatic actuator (B, F series)
This is connected to industrial compressed air piping for use in processes such as petrochemicals, chemicals, and chemicals. The corresponding valves are ball valves and butterfly valves. Actuator models are B, BS, BSW, 3B, FA and FAS type.
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Electric actuators for Butterfly and Ball valves – KELMO EX Series
The EX series is an actuator for electric opening and closing operations mounted on ball valves and butterfly valves. Aluminum die-cast castings are used for the actuator body, and planetary gears are used for the reduction gears.
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Actuator driven Compact Ball Valves
Bronze, brass and stainless steel valves with electric and pneumatic actuators are available.
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Cryogenic Valves
KITZ offers stainless steel and carbon steel gate, globe, check , and ball valves for processing, storage, shipment, and distribution of ethylene, LPG(Liquefied Petroleum Gas) , LNG (Liquefied Natural Gas) and other low-temperature or cryogenic fluids, down to -196 ℃（-321°F).
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