Safety valve is operated by pulse valve, both represent a pulse-safety device used to prevent steam overpressure in pipelines of pressure-reducing desuperheating stations, pressure-reducing stations, deaerators and other facilities of the thermal power plant. Connection to pipeline: 7с-6 – by flange, 7с-8 – by welding (or by flange at the customer’s option), pulse valve – by welding.
| Products ID | DN mm | PN мПа | Т, С° | Kvy, м3/ч | F, см2 | L, mm | H, mm | A, mm | d1, mm (d1/D1) | d2, mm (d2/D2) | Pp, MPa | Weight, kg |
| 7с-6-1 | 150 | 4,0 | 450 | 210 | 52 | 240 | 566 | 260 | 150 | 200 | 114 | |
| 7с-8-2 | 200 | Рр4,5 | 450 | 480 | 127 | 330 | 604 | 360 | 190/22 | 246/278 | 206 | |
| 7с-6-2 | 200 | 4,0 | 450 | 480 | 127 | 290 | 616 | 350 | 200 | 250 | 207 | |
| 7с-8-3 | 250 | Рр4,5 | 450 | 1020 | 253 | 370 | 735 | 430 | 240/290 | 400/460 | 438 | |
| 7с-6-3 | 250 | 2.5 | 450 | 1020 | 253 | 330 | 710 | 420 | 250 | 300 | 375 |
- Dn – Nominal bore, mm
- Pn – Nominal pressure, MPa
- Pp – Operating pressure, MPa
- Tmax – Working fluid temperature
- ξ – Friction coefficient, at most (determined against inlet nozzle diameter)
- Mtq – Drive shaft torque (w/o drive mounted on shaft), Nm
- Kvy – Nominal capacity, m3/h