Special Material Ball Valve
Port size: 1/2"~12" (DN15~DN300)
Pressure: PN16~PN40, CL150, CL300
Structure: Floating ball
Medium: sea water or other medium
Temperature: -29～150℃, -40～450℃
Body material: B148 C95800
Connection: Flange
Feature: C95800 C95500 C95400 is optional
Port size: 2"~16" (DN50~DN400)
Pressure: PN16~PN40, CL150, CL300
Structure: Trunnion ball
Medium: sea water or other medium
Temperature: -29～150℃, -40～450℃
Body material: B148 C95800
Connection: Flange
Feature: C95800 C95500 C95400 is optional
Port size: 1/2”~2” (DN15~DN50)
Pressure: CL150-CL1500
Structure: 3 PIECE BODY
Medium: sea water or other medium
Temperature: -20~150ºC
Body material: Bronze or others
Connection: Thread: BSP, BSPT, NPT, G, RC
Feature: For high pressure seawater
Port size: 2"~16" (DN50~DN400)
Pressure: PN16~PN40, CL150, CL300
Structure: Trunnion ball
Medium: sea water or other medium
Temperature: -29～150℃, -40～450℃
Body material: B148 C95800
Connection: Flange
Feature: C95800 C95500 C95400 is optional
Port size: 2"~16" (DN50~DN400)
Pressure: CL150-CL2500
Structure: Floating or trunnion
Medium: Water,steam,oil,etc.
Temperature: -29～150℃, -40～450℃
Body material: CY40 Nickel chromium alloy
Connection: Flange
Feature: For sea water good performance
Port size: 2"~26" (DN50~DN600)
Pressure: CL150-CL2500
Structure: Floating ball or Trunnion ball
Medium: sea water or other medium
Temperature: -29～150℃, -40～450℃
Body material: A890 Gr 4A Duplex Stainless Steel
Connection: Flange
Feature: For sea water good performance
Port size: 1/2"~12" (DN15~DN300)
Pressure: PN16~PN40, CL150, CL300
Structure: Floating ball
Medium: sea water or other medium
Temperature: -29～150℃, -40～450℃
Body material: 2205 2507 4A 6A F51 F53 F55
Connection: Flange
Feature: For sea water good performance
Port size: 1/2”~2” (DN15~DN50)
Pressure: CL150-CL1500
Structure: 3 PIECE BODY
Medium: sea water or other medium
Temperature: -20~150ºC
Body material: Bronze or others
Connection: Thread: BSP, BSPT, NPT, G, RC
Feature: For high pressure seawater
Product description of Special Material Ball Valve
Duplex stainless steel ball valve has the characteristics of both austenitic stainless steel and ferritic stainless steel because it has the duplex structure of austenite + ferrite, and the content of the two phases is basically the same. The yield strength can reach 400mpa~550mpa, which is twice that of ordinary austenitic stainless steel. Compared with ferritic stainless steel, duplex stainless steel ball valve has higher toughness, lower brittle transition temperature, and significantly improved intergranular corrosion resistance and welding performance; At the same time, it retains some characteristics of ferritic stainless steel, such as brittleness at 475 ℃, high thermal conductivity, low coefficient of linear expansion, superplasticity and magnetism. Compared with austenitic stainless steel, duplex stainless steel ball valve has high strength, especially the yield strength is significantly improved, and the pitting corrosion resistance, stress corrosion resistance, corrosion fatigue resistance and other properties are also significantly improved.
Features of Special Material Ball Valve
(1) Molybdenum containing duplex stainless steel has good chloride stress corrosion resistance under low stress. Generally, 18-8 austenitic stainless steel is prone to stress corrosion cracking in neutral chloride solution above 60 ° C. heat exchangers, evaporators and other equipment made of this kind of stainless steel in trace chloride and hydrogen sulfide industrial media tend to produce stress corrosion cracking, while duplex stainless steel has good resistance.
(2) Molybdenum containing duplex stainless steel has good pitting corrosion resistance. With the same equivalent value of pitting resistance (pre=cr%+3.3mo%+16n%), the critical pitting potential of duplex stainless steel is similar to that of austenitic stainless steel. The pitting corrosion resistance of duplex stainless steel and austenitic stainless steel is equivalent to AISI316L. The pitting and crevice corrosion resistance of high chromium duplex stainless steel containing 25% Cr, especially nitrogen, exceeds AISI316L.
(3) It has good corrosion fatigue and wear corrosion resistance. Under the condition of some corrosive media, it is suitable for making power equipment such as pumps and valves.
(4) Good comprehensive mechanical properties. It has high strength and fatigue strength, and the yield strength is twice that of 18-8 austenitic stainless steel. The elongation in solid solution state reaches 25%, and the toughness value AK (V-notch) is above 100J.
(5) It has good weldability and small hot cracking tendency. Generally, preheating is not required before welding and heat treatment is not required after welding. It can be welded with 18-8 austenitic stainless steel or carbon steel.
(6) The hot working temperature range of duplex stainless steel containing low chromium (18%cr) is wider than that of 18-8 austenitic stainless steel, and the resistance is small. It can be rolled directly to produce steel plates without forging. The hot working of duplex stainless steel containing high chromium (25%cr) is slightly more difficult than that of austenitic stainless steel, and it can produce products such as plates, tubes and wires.
(7) During cold working, the work hardening effect is greater than that of 18-8 austenitic stainless steel. In the initial stage of deformation of tubes and plates, it is necessary to apply greater stress before deformation.
(8) Compared with austenitic stainless steel, it has high thermal conductivity and low linear expansion coefficient, which is suitable for equipment lining and composite plate production. It is also suitable for making the tube core of heat exchanger, and the heat exchange efficiency is higher than that of austenitic stainless steel.
(9) There are still various brittleness tendencies of high chromium ferritic stainless steel, which is not suitable for working conditions higher than 300 ° C. The lower the chromium content in duplex stainless steel, σ The less harmful the equal brittle phase is.
Application of Special Material Ball Valve
The Duplex stainless steel ball valve adopts a side mounted structure. The high pressure reduces the connecting bolts of the valve body itself, enhances the reliability of the valve, and can overcome the influence of the system self weight on the normal operation of the valve. Duplex stainless steel ball valve are widely used as medium shunting, confluence or flow direction switching devices in coal chemical, petrochemical, rubber, papermaking, pharmaceutical and other pipelines.