Bellows globe valves A10 , A11

Bellows globe valves, A10-shut-off, A11-regulating, sizes from DN10 to DN40, pressure up to PN250, working temperature up to 350°C.

Contacts us

Working medium: radioactive water, water steams and all other working media in the hermetic and non-hermetic zones of nuclear power plants.
Application: nuclear and chemical industry.
Seismic Resistance: I-st class, according to IEC 980, IEEE 382, EN 60068-2-6;
Class of safety: 2-nd , съгл according to асно NP-068-05, NP-001-15.

The bellows valves A10 and A11 are designed with a monolithic body, inside which the bellows unit with the closing disk and the stem .
The body is produced of forging and the bonnet of precision casting.
The seats of body and disc are welded on with wear-resistant material.
The stem is made of special high-temperature and acid-resistant steel.
The connection is with butt welding type "BW" according to DIN, GOST, ČSN.
The control of the welded joints is by X-ray (ultrasonic) analysis.
The operation of the bellows globe valves A10 and A11 is performed by:
- Manual: - with handwheel.
- Electromechanical: - with electric actuator according to working conditions requirements and these of the customer.
The tests of the bellows globe valves are carried out in accordance with the standards for valves intended for nuclear power plants or according to the working conditions and customer requirements.
The bellows globe valves A10 and A11 can be installed in any position, but the installation must comply with the marking (arrow) indicating the direction of the fluid (working medium).
When installing a bellows globe valve equipped with an electric actuator, the manufacturer's installation requirements for the electric actuator must be observed.

The stem nut has two bearings guaranteeing long-term cycle of operation without maintenance and repair.
Unified design providing the possibility of less costs for spare parts by combining different sizes of forgings and casting.