1. Design and Manufacure conform to BS5163
2. Flange dimensions conform to BS4504 PN16& EN1092
3. Face to face dimensions conform to BS5163 PN16
4. Testing conform to BS6755
5. Rubber material may be also CR‚ EPDM etc
6. All valve surfaces shall be painted with Epoxy resin paint
7. It can be opertaed with wrench head according to customer' s requirement