A gas heaters is a space heater used to heat a room or outdoor area by burning natural gas, liquefied petroleum gas, propane or butane . Indoor gas heaters can be broadly categorized in flued or non-flued, or vented and unvented.
we focus on wall gas heater, portable gas heater. Natural gas heater provide clean, efficient heat on cold winter. Natural gas heaters can be wall-mounted or freestanding units to suit the rooms. Ventless heaters:Ventless gas heaters, also called vent-free or no-vent heaters.
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Calor Gas Heaters,Portable Gas Heater,Outdoor Gas Heater,Natural Gas Heater Fenry Manufacturing Co., Ltd , https://www.cnfenry.com
Screw and Barrel for Rubber Machine
Specification:
Diameter of pin screw and barrel: Φ 75mm-Φ 200mm
Diameter of cold feed or hot feed screw and barrel: Φ 30mm-Φ 300 mm
L/D ratio: 12-18
Technical Information
Base Materials:
1)38CrMoAlA(JIS SACM645)
2)42CrMo(AISI 4140)
3)4Cr5MoSi V1 (JIS SKD-61)
4)9Cr18MOV
5)HPT
Bimetallic alloy materials:
1)Fe-based alloy
2)Ni-based alloy/Deloro alloy
3)Co-based alloy
4)NiCo-based alloy
5)Tungsten carbide/Wolfram carbide
Technics:
Heat treatment
High-frequency quenching
Nitriding treatment
Hard-chrome electroplating
Bimetallic alloy welding
Bimetallic alloy centrifugal casting
Technical parameter:
Nitrided layer depth: 0.5-0.8mm
Nitrided hardness: 900-1000HV
Nitrided brittleness: Less than grade 1
Surface roughness: Ra0.4
Linearity of screw: 0.015mm
Hard-chrome plating hardness after nitriding: >=950HV
Chrome-plating layer depth: 0.025-0.085mm
Bimetallic layer depth: 3mm
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.