HYDRO FLANGE ADAPTORS & COUPLINGS
Hydro Flange Adaptors 
Flange Adaptors are used to join a plain-ended pipe to a flanged pipe, fitting
or valve giving an effective leak proof seal. They can accommodate a 
considerable amount of deflection without loss of performance.

Harnessed flange adaptors used in conjunction with a flange spigot 
(complete with a tie flange) are an excellent method for providing a 
dismountable joint in a flanged pipeline. This is achieved by replacing four of
the bolts with tie studs. Where necessary the backing ring of the flange 
adaptor is notched to give clearance for the tie studs. 
               
Hydro Couplings
Couplings are used to join plain-ended pipes of the same material together; 
some wide tolerance couplings can join different pipe materials. Couplings 
offer a considerable amount of deflection, which makes them the ideal choice
for underground applications.

The Aifu ‘HYDRO’ Range of Flange Adaptors and Couplings are manufactured
to the highest standards and coated in Plascoat PPA571, this system
complies fully to BS 6920 and is WRAS approved for use with potable water,
offering easy and reliable pipe jointing with a durable long lasting corrosion
protection system. 

The ‘S’ range of Flange Adaptors & Couplings are available in sizes to suit 
80mm-300mm NB pipes these are a mid range product suitable for PVC, Steel
and Ductile Iron pipes. For sizes above 300mm NB we offer a dedicated range
to suit Ductile Iron pipe only these are available in sizes 350mm-700mm. 
Standard flange drilling is PN16. 

The HY range of Hydro Flange Adaptors and Couplings have a wide range and
will accommodate most pipeline materials. They are available in sizes to suit
50mm-300mm NB pipe. 

Hydro Resilient Seat Gate Valve offers quality and reliability along with high
performance. The valve has full WRc approval, and the EPDM rubber seat is 
BS 6920 approved. The watertight seal make this valve perfect for all 
potable and clean water pipeline applications. Hydro Resilient Seat Gate 
Valves are 100% factory tested to the requirements of BS 5163-Body test 
at 1.5 x PN, Seat tested from both sides at 1.1 x PN. The standard internal 
and external corrosion protection system is WRAS and DWI approved Plascoat
PPA571 to 200 microns.

Features:
• Low operating torque
• Bubble tight shut off
• Unobstructed waterway
• Fully encapsulated gate
• Double stem seal and dirt seal
• O-rings below stem collar
• Approved Plascoat PPA571 all over coating
• Square bottom to facilitate storage
• Size range 50mm-200mm
• All seals by O-ring
• Full WRc approved Rubber and Coating
• Choice of jointing options-Flanged, PVC Socket, MJ Socket & Spigot