Features：

- The Pit vacuum furnace is a high-precision vacuum furnace manufactured by our company's patented technology. It is mainly used for vacuum heating, tempering, bright annealing and quenching heat treatment of various mechanical parts and metal workpieces.

- The Pit vacuum furnace adopts the shape structure of the well type furnace, and has various advantages such as simple operation, low failure rate and excellent heat preservation performance. High-temperature stainless steel vacuum tank vacuum furnace in the furnace, with large X-ray flaw detection pressure test, equipped with 2X rotary vane vacuum pump, using pre-vacuum method, with protective atmosphere intake and exhaust interface, can achieve bright annealing, vacuum tempering , vacuum non-oxidation heating and other heat treatment applications, the working temperature range of the well type vacuum furnace can reach 450-1100 °C various vacuum heat treatment according to different designs.

Pit vacuum furnace structure:

- It consists of furnace shell steel structure assembly, furnace lining, insulation layer, heating element, stainless steel vacuum tank, inner heat preservation furnace cover, and microcomputer program automatic temperature control system. The outer casing is mainly made of a steel plate coil into a well type furnace shell, and the steel body is welded into a furnace body structure. The furnace lining adopts ultra-lightweight micro-bead energy-saving refractory brick, and the high-purity ceramic fiber insulation cotton is placed between the furnace lining and the furnace shell, which belongs to the ultra-energy-saving furnace lining. The heating element is made of a high temperature resistant wire or a resistor tape. The furnace cover is made of stainless steel and sealed with double water-cooled vacuum rubber. The vacuum tank body is made of 1Cr18Ni9Ti stainless steel plate and is protected by automatic welding. In use, two vacuum tanks can be alternately and continuously operated to increase production efficiency.

- The Pit vacuum furnace is divided into multi-zone temperature control from the top to the bottom, and the power is designed with high precision. The use of multiple microcomputer program temperature control cabinet, automatically display the measured furnace temperature to calculate the temperature rise slope temperature value and set value, over temperature alarm and automatic process curve record. Can not determine the 8-stage process curve, temperature control accuracy soil 1 °C.

Technical Parameters：