Guarantee
Comprehensive Documentation
Shipping
Technical Specifications
Nominal diameter DN 25-1200
Nominal pressure PN10-63
Medium temperature -29 °C ... +350 °C
Types of Valve End Connections Flanged, Between Flanges
Sealing Class «А»
Mounting Position Any, except for downward-driven devices
Types of Control — manual (lever)
— manual (handwheel)— manual (gearbox)— pneumatic actuation
— electric actuation
Warranty Period 12 months
Average Service Life 10 000 cycles
Guaranteed Service Life Not less than 5000 cycles
Technical Drawings and Dimensions
Table of Basic Dimensions
Nominal diameter PN16
Product Description
The Ball Valve model 421 is used for controlling and shutting off the flow of the working medium.
The regulating element is in the form of a V-shaped hemisphere, enabling a proportional regulation characteristic. The combination of sealing materials ensures valve reliability at temperatures up to +350°C. The valve is characterized by a low torque due to the small friction surface of the regulating element with the housing.
Design features of the model:
- V-shaped segment with a wide selection of wear-resistant coatings
- Uniform regulation characteristic
- Easy repair capability (possibility of replacing seals, sealing inserts, segment)
- Possibility of producing a segment valve with a connection of the segment to the piston using slots
- Low torque
- Short design length
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