Diaphragm Control Valve
M3000
Automatic control valves, as described by EN 1074-5, “have the integral capability to control the function using energy from the conveyed water by adjusting the position of the obturator.
They can be directly operated, i.e. the force is applied (via a spring or diaphragm) directly to the obturator. They can be pilot operated, i.e. the force is applied through an adjustable pilot valve”.
This type of conveyed flow valves is the result of years of study, design and research carried out by T.I.S Nuoval over the years, both internally and directly on the plants.
These valves are available in sizes from DN50 to DN1000, flanges to EN 1092-2, with nominal pressures PN10 - PN16 - PN25.
These valves can be built as :
• Pressure reducing valves
• Pressure sustaining valves
• Altimetric valves
• Float controlled valves
DESIGN FEATURES
• Hydraulic testing according to EN1074-5;
• Compliance with EN 1074-5 and EN 1074-1;
• Parts in contact with the water comply with DM 174 of 6/04/2004 and KTW, DVGW W270, WRAS standards;
• One-piece body in ductile cast iron EN GJS 400-15 EN 1563 (GS 400-15);
• Face to face according to EN 558 Series 1;
• Flanges dimensioned and drilled according to EN 1092-2;
• Stem in 1.4301 EN10088-3 (AISI304) and guided at both ends;
• Seat ring in 1.4408 EN10283 (AISI316);
• Seal retaining ring in 1.4301 EN10088-3 (AISI304);
• Main seal in EPDM;
• Spring in 1.4310 EN10270-3 (AISI302);
• Obturator in 1.4401 EN10088-3 (AISI316) stainless steel, ductile cast iron EN GJS 400-15 and coated steel (according to DN
and PN of the valve);
• Diaphragm in NBR with nylon reinforcement;
• All screws, washers and nuts in stainless steel A2-70 EN ISO3506-1 (inside);
• Internal/external FBE coating protection (Fusion Bonded Epoxy), blue RAL5015, 250 μm thickness.
MAIN VALVE ACCESSORIES
• Depending on the operating conditions, a V-PORT (page 94) can be supplied in 1.4301 EN10088-3 (AISI304) or 1.4306
EN10088-3 (AISI304L);
• Depending on the operating conditions, a DOUBLE SLOTTED CYLINDER (page 95) can be supplied in 1.4301 EN10088-3
(AISI304) and 1.4401 EN10088-3 (AISI316).
PILOT CIRCUIT ACCESSORIES
• Pipes in 1.4401 EN10088-3 (AISI316), fittings in 1.4401 EN10088-3 (AISI316);
• Compression fittings in brass / 1.4401 EN10088-3 (AISI316);
• Strainers and speed regulators in 1.4401 EN10088-3 (AISI316) and brass;
• Isolating ball valves in Nickel-plated brass;
• Pilots in 1.4401 EN10088-3 (AISI316) and brass;
• Position indicator in hardened glass and brass;
• Pressure gauges in 1.4301 EN10088-3 (AISI304) and glycerin;
• Pressure gauge holder with drainage in Nickel-plated brass;
• Floaters in 1.4306 EN10088-3 (AISI304L).
HIGH CORROSION RESISTANCE MATERIALS
On request, some components can be produced with high corrosion-resistant materials, for example:
• Stem, seal retaining ring and obturator from DN50 to DN125 in 1.4401 EN10088-3 (AISI316) stainless steel;
• Screws, washers and nuts in A4-70 EN ISO3506-1 stainless steel;
• V-PORT in 1.4401 EN10088-3 (AISI316) stainless steel;
• DOUBLE SLOTTED CYLINDER in 1.4401 EN10088-3 (AISI316) stainless steel;
PILOT CIRCUIT ACCESSORIES
• Strainers, speed regulators, ball valves and pressure gauge holders in 1.4401 EN10088-3 (AISI316) stainless steel;
• Pilots in 1.4401 EN10088-3 (AISI316) stainless steel;
• Screws, washers and nuts in A4-70 EN ISO3506-1 stainless steel.
OPERATIVE LIMITS
Valves are designed and manufactured to operate with drinking or industrial water without suspended solids. For any other use,
please contact the manufacturer.
• Working temperature: (water temp.) min.+0°C (excluding frost) max. + 70°C (on request up to 90°C).
• Storage temperature: (air temp.) min. - 20°C max. + 70°C.
