ULTRA 21 – Ultra Performance non-return valve: compact, quiet, ideal for low-pressure applications, DVGW-certified
€513.72
Available, delivery time: 1-3 days
Product information "ULTRA 21 – Ultra Performance non-return valve: compact, quiet, ideal for low-pressure applications, DVGW-certified "
WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested and holds a DVGW certificate. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. They can also be used as a safety device against flame back-flow (tested in accordance with DIN EN ISO 5175-1, Section 6.7) when burning natural gas with air, but in this case the maximum operating pressure is 2 bar.
Highlights :
- Safety element: Gas backflow valve [NV]
- every gas backflow preventer is 100% tested
- in accordance with DIN EN ISO 5175-1 / DIN EN ISO 5175-2
- DVGW approval no. DG-4390DN0243
- Suitable for use in applications according to EN 746-2
- offer minimal pressure losses – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar)
- compact and lightweight: 52 x 67.5 mm, 510 g
- minimal noise emission
- offer long service life thanks to protection against contamination from the gas supply – via a dirt filter in the inlet made of stainless steel wire mesh (100 μm)
- the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C
- minimal leakage – thanks to the use of a spring-loaded valve system with elastomer seals
- wide range of applications – suitable for use with many technical gases
- reduce planning effort through layer-independent installation
| Blow-off flow rate: | See data sheet (download area) |
|---|---|
| max. working pressure: | 2 bar (as a backflow preventer for combustion with air in accordance with DIN EN ISO 5175-1), 16 bar (as a non-return valve for non-flammable gases in accordance with DIN EN ISO 5175-2) |
| Opening pressure: | 4 mbarg |
| Connection Inlet: | 7/8" - 14 UNF VCR (male thread) |
| Connection outlet: | G 3/4 (female thread) |
| Housing material: | Brass (CuZn39Pb3) |
| Temperature range: | -20 °C / -4 °F to +70 °C / 158 °F |
| Weight: | 0,7 kg |
