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Documentation
Spare parts
Details
Concentric cast iron butterfly valves
Our range of concentric cast iron butterfly valves contain both wafer and lug types that can be used between flanges PN10/16, ANSI 150 up to DN600, and JIS 10K up to DN300.
The body of our butterfly valves is made from epoxy-coated GG25 cast iron (GGG40 above DN600), and our soft seats and seals are made with vulcanized EPDM or vulcanized NBR. The vulcanization of the seat increases mechanical strength, which helps avoid creeping and wrenching. EPDM can withstand temperatures from – 10 °C up to + 110°C (with a transient peak at + 130°C), whereas our vulcanized NBR seats can withstand + 80°C. Our valves can tolerate pressures of 16 bar up to DN300, and 10 bar above. Our valves are fitted with nickel-plated ductile iron or stainless steel discs that are held in place thanks to shank grooves, which help avoid mechanical slack during use. The one-piece axis is kept airtight by two levels of PTFE and NBR seals. The ISO 5211 mounting pad allows easy mounting of pneumatic or electric actuators, or manual gearboxes. These valves can be used with a wide variety of fluids, including hot and cold water, demineralized water, alcohol, lime milk, mercury, alkaline solutions, sodium hydroxide… They are also suitable for gas such as air, nitrogen, etc.
Details
| DN inches NPS | 2'' |
|---|---|
| Option certificate 3.1 | Yes |
| DN metric | 50/60 |
| Construction standard | API 609 |
| CE risk category | III Module H |
| Type of paint | Epoxy |
| Paint coating thickness (µm) | 80.00 |
| EN face-to-face standard | EN 558 Series 20 |
| DIN face-to-face standard | DIN 3202 Part.3 Series K1 |
| ISO face-to-face standard | ISO 5752 Series 20 |
| Tightness test standard | API 598 |
| Type of seat | Vulcanized |
| Notch plate | Yes |
| Opening device | Handle |
| Application | Air conditioning / Heating |
| Shaft/stem matérial | Stainless steel AISI 416 |
| Lockable | Yes |
| Square, star (mm) | Square 9 mm |
| Torque (Nm) | 16.0 |
| Face to Face (mm) | 43.0 |
| Fluid | Hot water / Cold water / Drinking water |
| Kv (mÂł/h) | 98.0 |
| Seat | NBR |
| Body material | Cast iron |
| Disc material | Stainless steel ASTM A351 CF8M |
| ISO pad 5211 | F05 |
| PS (bar) | 16 |
| Connections | Between flanges PN10/16 #150 |
| TS max (°C) | 80 |
| TS min (°C) | -10 |
| Butterfly valve design | Concentric |
| Wafer/lug | Wafer |
| Through shaft | Yes |
| Warranty period | 2 years |
| CE | Yes |
| Handle material | Aluminium |
Cast iron butterfly valve 1121 wafer CF8M disc/NBR seat
The 1121 series butterfly valve is a wafer-type valve with a cast iron body, stainless steel disc and vulcanised NBR seat. It can be used to isolate or control hydrocarbon, fuel, water, natural gas, oil, compressed air and glycol systems.