1. Purpose of the equipment.
The “SNV-80” plant designed for annealing products made of titanium alloys.

2. Features of the physical processes used.
The operation of the furnace “SNV-80” is to heat the workpiece to a certain temperature in a vacuum, hold it at this temperature and cool it.
Annealing is a process of heating of a part to critical temperature and then slowly cooling it. Annealing changes the structure of the alloy, reduces hardness, imparts ductility and toughness, and eliminates internal stresses.

3. Main components of the “SNV-80” plant:
- Chamber;
- Front lid;
- Rear lid;
- Heating oven;
- Control cabinet;
- Vacuum system;
- Pneumatic system;
- Water cooling system;
- Electrical wiring;
- Power cabinet;
- Transformer cabinet.

3.1. Design of “SNV-80”.
The vacuum chamber has a cylindrical shape. The chamber made of sheet stainless steel. The chamber has four supports for mounting it on a stand.
Flanges of attached front and rear lids welded to the ends of the chamber cylinder. Each lid made of two elliptical stainless steel heads welded to own flanges. The front lid attached to the chamber by hinges (hereinafter referred to as the door). Two pneumatic clamps close and fix the door. The chamber and lids have a water jacket.
Thermocouple inputs, current leads and pipes are welded to the chamber.
The pneumatic system is located on a stand under the chamber. Pneumosystem controls the pneumatic actuators of the vacuum valves and the shutter.
The heating furnace, located inside the chamber, consists of a shielded housing, door, rear removable panel and heater. Products to be annealing are placed in a tray inside the furnace.
The vacuum system makes a vacuum in the chamber. The system consists of a forevacuum pumping line and a line for creating a high vacuum.
A rotary vane vacuum pump produces fore-vacuum media.
The high-vacuum pumping line consists of a mechanical pump and a diffuse pump connected in series. Sensors measure the vacuum level.
All valves and gates of pneumosystem are equipped with pneumatic actuators.
The water cooling system supplies and drains necessary water for cooling the plant systems during the heat treatment mode. The water cooling system must be connected to the workshop water supply system. The supply water temperature should be 25 °C or less. Sensors measure water flow at the outlet. An alarm signal appears when there is no water at the drain.
The electrical distribution provides a power supply to the current leads of the heating furnace, as well as to the elements of the vacuum and pneumatic systems and consists of cables, harnesses with electrical wires, protective covers and boxes.
Control cabinet controls the technological process.

Features of the “SNV-80” plant.
- Reducing power consumption and saving energy when heat treating small-sized products weighing up to 10 kg,
- Increased reliability,
- Intelligent control functions.