NABIC Fig 256B pipe interrupter is classified as a type DB device suitable for protecting up to fluid category 4.
This device has a moving element which seals the ventilation gaps during normal flow conditions. When negative pressures occur on the inlet side which could cause siphonage, the membrane retracts seals the flow ports and simultaneously vents the outlet side of the pipe interrupter.
Medium: Water
Size Range: DN10 - DN20
Pressure: 0.5 to 10 bar
Material: Chrome Plated Brass
Temperature: -20 to 60°C
Connection: Male inlet and outlet
Pipe Connections
Male BSP inlet and outlet connections: G3/8", G1/2" and G3/4" to ISO228A. DN15 and DN20 female connections G1/2" and G3/4" to ISO228
Testing
All valves are 100% production tested.
Product Extras
Materials
| ITEM NO. | PART NAME | MATERIALS |
|---|---|---|
| 1 | Body Material | Brass |
| 2 | Internals | Plastic |
| 3 | Membrane | EPDM |
Dimensional Drawings
Dimensions & Weights
| SIZE DN |
BSP G |
L | D | Kv |
|---|---|---|---|---|
| 10M | 3/8" | 89 | 29 | 0.26 |
| 15M | 1/2" | 89 | 29 | 0.26 |
| 20M | 3/4" | 90 | 29 | 0.61 |
| 15F | 1/2" | 82 | 29 | 0.26 |
| 20F | 3/4" | 68 | 29 | 0.61 |
Price £48.49
You must select a value for all options provided.
We had an existing NABIC Fig. 500 safety valve installed in our steam boiler factory which needed replacing. The valve had started to leak due to its old age.
I had no hesitation in purchasing another as it’s been a great product. I was very happy with the service of the website, as well as the prices. The fact the valves come with the necessary certifications is also great.
Wayne Barnes- Engineering Co-ordinator, Newlywed Foods