Czech
Overflow protections type GSW 57 (DN15 – DN50)
6.2
Catalog sheet: 6.2.2
Overflow protections are automatic safety devices that block the gas flow in the pipeline if the set maximum value of maximum gas flow is exceeded. To recovery operation after closure of the flow is carried out automatically after the cause of the closure is removed.
| Type | DN | V gas (m3/h) |
V air (m3/h) |
d 1 | d 2 | L (mm) | SW | Colour coding | Catalogue No. |
| GSW 57 | 15 | 2,5 | 2 | R½" | Rp½" | 52 | 27 | yellow | GSW5715025AI |
| GSW 57 | 20 | 1,6 | 1,3 | R¾" | Rp¾" | 52 | 32 | white | GSW5720016AI |
| GSW 57 | 20 | 2,5 | 2 | R¾" | Rp¾" | 52 | 32 | yellow | GSW5720025AI |
| GSW 57 | 20 | 4 | 3,2 | R¾" | Rp¾" | 52 | 32 | brown | GSW5720040AI |
| GSW 57 | 25 | 2,5 | 2 | R1" | Rp1" | 54 | 41 | yellow | GSW5725025AI |
| GSW 57 | 25 | 4 | 3,2 | R1" | Rp1" | 54 | 41 | brown | GSW5725040AI |
| GSW 57 | 25 | 6 | 4,8 | R1" | Rp1" | 54 | 41 | green | GSW5725060AI |
| GSW 57 | 32 | 10 | 8 | R1¼" | Rp1¼" | 67 | 50 | red | GSW5732100AI |
| GSW 57 | 40 | 16 | 8 | R1½" | Rp1½" | 76 | 60 | orange | GSW5740160AI |
| GSW 57 | 50 | 16 | 12,8 | R2" | Rp2" | 80 | 70 | orange | GSW5750160AI |
For pipelines:
DN15 – DN 50
Medium:
All types of gases according to EN 437 and DVGW AB G 260/1
Operating pressure:
15 – 100 mbar
Operating temperature:
-20ºC up to +60ºC
Closing flow:
925ºC
Flow rate for closure:
2.5–16 m3/h (colour coded)
Pressure loss:
<0,5 mbar
Automatic recovery after closure:
<30l/h při 100 mbar
Indication of gas flow direction:
Arrow on fitting body