BUTTERFLY VALVES

1. CENTRIC BUTTERFLY VALVES

Main application:
Transport and distribution of:
- cold and hot industrial water;
- saturated vapours;
- petroleum products;
- fluids charged with solid particles (consistency max. 3%)
on condition that the compatibility regarding the corrosion, erosion and safety in work in relation to the design and materials used to be ensured.
Design and working characteristics:
- type: - “W” – Wafer
               - “L” - Lug
               - “F” - Flanged
- shaft: - one-piece;
                - two-pieces;
- connecting flanges: - ISO, BS, DIN, ANSI.
- Overall length: ISO, BS, DIN, ANSI.
- Flanged body STAS 10933/2
- Max. liquid flow speed: - 4 m/s – for PN 10
                                             - 5 m/s – for PN 6.
Working temperature: Tmax/Tmin
80°C/-10°C – for NBR type rubber
120°C/-10°C – for EPDM type rubber.
Operation:
AM – manual with lever;
AR – manual with gear box;
AE – electric operation;
AP – pneumatic operation.
Mounting:
- indifferent flow direction;
- indifferent mounting position.
Factory tests; Test pressures; Leakage:
- hydraulic tests in conformity with ISO 5208;
- test pressure: - shell – 1.5xPN (bar)
                            - seat – 1.1xPN (bar).
- maximum allowable leakage at seat test – in conformity with ISO 5208, grade A.
Inquiry and order form
It is recommended to fill up the technical sheet of agreement.

2. ECCENTRIC BUTTERFLY VALVES

Main application:
Transport and distribution of:
- industrial cold and hot water;
- saturated vapours;
- food products;
- fluids charged with solid particles (consistency max. 3%)
on condition that the compatibility regarding the corrosion, erosion and safety in work in relation to the design and materials to be ensured.
Design and dimensional characteristics:
- type: - “F” – flanged body;
- shaft: - two-pieces;
- connecting flanges: ISO, BS, DIN, ANSI
- face-to-face length: ISO, BS, DIN.
- maximum liquid flow speed:
- 3 m/s – for butterfly valve PN 2.5;
- 4 m/s – for butterfly valve PN 10
- 5 m/s – for butterfly valve PN 16 and PN 25.
Working temperature: Tmax/Tmin
80°C/-10°C – for NBR rubber;
120°C/-10°C – for EPDM rubber;
150°C/-10°C – for THERBAN rubber.
Operation:
AM – manually;
AR – manually with mechanism and gear bos;
AE – electrically.
Mounting:
- preferential flow direction, marked with arrow on body;
- mounting position: - on horizontal pipes;
 - on vertical pipes.
Factory tests; Test pressure; Leakage:
- hydraulic tests in conformity with ISO 5208;
- test pressure: - shell – 1.5xPN (bar);
                            - seat – 1.1xPN (bar);
- maximum allowed leakage at seat test – in conformity with ISO5208, grade A.
Inquiry and order form:
It is recommended to fill up the technical sheets of agreement.