Twin Screw Extruder Screw Element

  • Model NO.: Customized
  • Nitrided Layer Depth: >=0.4mm
  • Material: W6mo5cr4V2
  • Trademark: Zhongyang
  • Origin: Zhejiang of China
  • Screw Elements: Twin Screw Extruder Screw Element
  • Nitrided Hardness: 900-1000hv
  • D/D Ratio: 1.55
  • Specification: ISO9001: 2008
  • HS Code: 84779000
Twin screw extruder screw element

Specification:
Parallel twin screw diameter: Φ 18-Φ 177mm

Material:
1)W6Mo5Cr4V2
2)38CrMoAlA(JIS SACM645)
3)42CrMo(AIS14140)
4)S45C

Technics:
1)Heat treatment
2)Nitriding treatment
3)Vacuum quenching

Technical parameter:
D/d ratio: 1.55
Nitrided layer depth: >=0.4mm
Nitrided hardness: 900-1000HV

Warranty and service: 1 year

Our advantages:
1)Excellent raw materials
2)Good customer service
3)Rapid delivery
4)Reasonable price
5)Production quickly

Experienced manufacture, we will be the best choice.

Engine Valve

The role of the valve is specifically responsible for the input of air into the engine and exhaust the exhaust gas after combustion. From the engine structure, it is divided into Intake Valve and Exhaust Valve.
The role of the intake valve is to draw air into the engine and mix it with the fuel to burn; The function of the exhaust valve is to discharge the exhaust gas after combustion and dissipate heat.

The valve is composed of a valve head and a rod. The valve head temperature is very high (intake valve 570~670K, exhaust valve 1050~1200K), but also withstand the pressure of the gas, the valve spring force and the transmission component inertia force, its lubrication, cooling conditions are poor, requiring the valve must have a certain strength, stiffness, heat and wear resistance.
The intake valve is generally made of alloy steel (chromium steel, nickel-chromium steel), and the exhaust valve is made of heat-resistant alloy (silicon chromium steel).
Sometimes in order to save heat resistant alloy, the exhaust valve head is made of heat resistant alloy, and the rod is made of chromium steel, and then the two are welded together.
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