Virtually all construction materials used in KITZ brand valves are manufactured in-house, based on our policy of integrated production from materials to finished products. We receive materials for more than 40,000 types of valve products that we manufacture in our own foundry, which is fully equipped with cutting-edge automated production equipment to ensure high productivity and a constant supply of superior quality materials.
Bronze
Bronze is an alloy of copper, tin, zinc and lead. Because of its good wear resistance, corrosion resistance and machinability, bronze is ideal for complex castings. It is also suitable for valves used in low/medium pressure service.
Brass
Brass is an alloy of copper and zinc. It has excellent forgeability and machinability and is more economical than bronze.
Cast iron lining
Nylon 11 and epoxy resin are powder-coated on the inner and outer surfaces of an iron valve, creating a lining that is useful for preventing red, rusty water. It is also suitable for use in drinking water supply lines.
Cast iron
This is mainly used for comparatively low pressure and low temperature applications.
Cast steel
Because of its wide range of working temperatures and pressures, cast steel is commonly used for pipelines in oil fields, refineries and petrochemical plants.
Ductile cast iron
This is commonly used in steam, water, gas and oil pipeline systems because of its wide range of working temperatures and pressures. It offers high performance for its cost.
Stainless steel
Because of its excellent corrosion resistance and durability, this material is commonly used in a wide spectrum of applications, ranging from the petrochemical industry to general plant systems.
Special alloy steel
This metal has the highest resistance to corrosion and pitting corrosion.
Materials Used in Valves
Metallic materials
(for the valve body and internal components
such as the stem, ball and disc)
Nonmetal materials
(for the gasket, packing and seat)
[Iron-based]
Carbon steel and cast iron
(An alloy consisting
mainly of iron and carbon)
Alloy steel
(A steel to which one or more alloying elements, other than carbon, (e.g., Ni, Cr, Mn, W and Mo) have been deliberately
added to achieve a particular physical property)
[Nonferrous]
Copper alloy
(Bronze, brass)
Light alloy
(Any one of various metal alloys consisting mainly of aluminum (Al) or magnesium (Mg) to which one or more alloying elements have deliberately been added
(e.g., Cu, Zn, Si))
[Rubber-based]
EPDM
(Ethylene-propylene rubber)
NBR
(Acrylonitrile-butadiene rubber)
FKM
(Fluoroelastomer)
[Plastic-based]
PTFE
(Polytetrafluoroethylene)
PA
(Polyamide resin)
Typical Materials for Gate Valves, Globe Valves and Check Valves
Base material
Valve body
Stem
Disc
Bronze / Brass
Bronze (CAC401,CAC406)
Brass (C3771)
K metal (C3531)
Bronze
Brass
Cast iron
Gray cast iron (FC200,FC300)
Stainless steel
Brass
Gray cast iron
Ductile iron
Ductile iron castings (FCD-S)
Stainless steel
Stainless steel
Cast steel
Carbon steel castings for high temperature / pressure service (SCPH 2)
Stainless steel
Stainless steel
Stainless steel
Stainless steel castings
(SCS13A,SCS14A)
Stainless steel
Stainless steel
Typical Materials for Ball Valves
Base material
Valve body
Stem
Ball
Bronze / Brass
Bronze (CAC401)
Brass (C3771)
K metal (C3531)
Stainless steel
Brass
Stainless steel
Cast iron
Gray cast iron (FC200)
Stainless steel
Stainless steel
Ductile iron
Ductile iron castings (FCD-S)
Stainless steel
Stainless steel
Cast steel
Carbon steel castings for high temperature / pressure service (SCPH 2)
Stainless steel
Stainless steel
Stainless steel
Stainless steel castings
(SCS13A,SCS14A)
Stainless steel
Stainless steel
Typical Materials for Butterfly Valves
Base material
Valve body
Stem
Disc
Cast iron
Nodular graphite cast iron
(FCD450-10)
Stainless steel
Stainless steel
Nodular graphite cast iron +
Nickel plating
Gray cast iron (FC200)
Stainless steel
Stainless steel
Nodular graphite cast iron +
Nickel plating
Nodular graphite cast iron +
Nylon lining
Aluminum
Aluminum alloy (ADC12)
Stainless steel
Stainless steel
Stainless steel
Stainless steel castings (SCS13A)
Stainless steel
Stainless steel
Valve Body Material Characteristics
Body material
Characteristics
Gray cast iron (FC200)
Gray cast iron has a long history that dates back many centuries. It is used mainly for valves in relatively low-pressure and low-temperature service. It is also used in a wide range of applications, from kitchen utensils to art pieces.
Nodular graphite cast iron
(FCD450-10)
Invented in 1948, this metal is increasingly in demand, as it conveniently combines the excellent machinability characteristic of cast iron with a toughness that is comparable to copper. Because of this toughness, it is also called ductile cast iron.
Ductile iron castings (FCD-S)
Carbon steel castings for high temperature / pressure service
(SCPH2)
Carbon steel is tough and has excellent hardness, tensile strength and impact value.
It is commonly used in industrial plants for high temperature / pressure applications.
Stainless steel castings
(SCS13A,SCS14A)
Although comparatively expensive, stainless steel has superior corrosion resistance, heat resistance, low-temperature resistance and excellent mechanical properties.
Bronze (CAC401,CAC406)
Bronze is an alloy of copper to which tin, zinc and lead are added to achieve particular physical properties. Historically, it was the first metal used for casting. Brass is an alloy of copper and zinc. Both alloys have excellent machinability and corrosion resistance and are used for relatively small valves in low-pressure service.
Brass (C3771)
Working Pressure & Temperature Range for Valve Body Materials
Body material
Max. permissible pressure (MPa)
Permissible temperature range (°C)
Gray cast iron
Nodular graphite cast iron
Ductile iron castings
Carbon steel castings for high temperature / pressure service
Stainless steel castings
Bronze
Brass
Note: The above permissible temperature values indicate the limits within which each respective material can operate, not the working temperature range for the valve body made from that material.
The permissible temperature range for a given valve depends mainly on its configuration and the sealing material. For more information, please see the appropriate catalog.