Pre-Torqued Holders
PRO holders use high-tensile screws to establish the disc’s metallic seal before installation between flanges. The flange connection can be opened for inspection, cleaning or gasket replacement without loosening this seal.
Models
- SHZ Pro
- Pre-torqued — forward acting discs, Series SZ
- SHU Pro
- Pre-torqued — reverse acting discs, Series SU
Advantages in the application
- Metallic sealing independent of the flange connection conditions.
- Disc inspection without replacing an undamaged disc.
- Convenient workshop assembly and simplified installation using flange-screw centring.
- Standardised holders reduce storage requirements.
- Suitable for sensitive lined pipework, fouling processes and installation points that are difficult to access.
- The manufacturer reports shutdown-time reductions up to 80%; see the PDF for application details.
Specifications
- Nominal widths
- DN 25, 40, 50, 65, 80, 100, 125 and 150
- Flange ratings
- DIN and ANSI ranges depend on size; see the original PDF table.
- Holder material
- Stainless steel 1.4571; bar steel up to DN 80, sheet from DN 100.
- Special materials / liners
- Hastelloy, Duplex and PTFE on request.
- Screws
- DIN 912 / ISO 4762, strength class 14.9, zinc-aluminium coating.
- Dimensions and weights
- Size-specific installation heights, weights and screw dimensions are provided in the PDF.
Related discs and accessories
Select your holder
Select a model and add your application details. This is an enquiry selection; Sightflow will confirm the final specification. Fields marked * are required.