BS: British Standard
BSP: British standard pipe
CF: Copper alloy faced
DI: Ductile iron
DN: Nominal diameter
FBE: Fusion bonded epoxy
FF: Flat face
FLG: Flange
HW: Handwheel
ID: Internal diameter
LW: Lever weight
NRS: Non-rising stem
OS&Y: Outside screw & yoke
PCD: Pitch circle diameter
PFA: Allowable operating pressure
PN: Nominal pressure
RF: Raised face
SG: Spheroidal iron
SS: Stainless steel
STD: Standard
We would always recommend a distance of five pipe diameters from any turbulence inducing component, such as an elbow, tee or pump.
Our valves are coated in a durable fusion bonded epoxy coating, the colour is RAL5005.
The following ranges are WRAS approved; Aquavault resilient seat gate valve (DN50 – DN300), Aquabrake air valve (1” – DN200) and swing check valve (DN50 – DN600).
Yes. The pressure rating of the valve is cast into the body. This is the maximum pressure the valve shell can withstand under working conditions. However, the flange drillings could be PN6, PN10, PN16, PN25, PN40, ASA150, BS10 Table D, BS10 Table E or other.
Valves are designed for either clean/potable water or wastewater applications having a maximum media temperature of 70°C and maximum velocity of 3 m/s. For valves outside of these parameters, please contact the sales office.
Yes. Basic hand tools will be required. Always relieve pipeline pressure and isolate the flow before commencing any work.
Each individual valve is subjected to a hydrostatic pressure test as it leaves the production line. The body/shell is tested to 1.5 x PN and seat to 1.1 x PN.
A valve interlock is a mechanical lock that can be used to authorise the operation of a sequence of valves. For example, a valve can be operated by inserting the control key to the first lock which once operated, releases the second key to operate the second, and so on. Contact the sales team to discuss your requirements on +44 (0) 1630 647200.
A valve operating element is the mechanism in which torque is transferred to the valve, normally a handwheel, stem cap (also known as a dolly or false cap) or lever.
These items are interchangeable across the T-T Flow range but may not necessarily fit valves from other manufacturers
Operating equipment is fabricated in-house to site-specific requirements in a variety of materials. Extension spindles are available as a one-piece or sectional for site adjustment, also optional gaitored universal-joints to accommodate off-sets.
Headstocks, also known as pedestals, are fabricated in complementing materials and can be either thrust or non-thrust taking with the optional indication. These are supplied fitted with various operating elements such as a handwheel, gearbox, actuator or interlock. Contact us to discuss your requirements.
Wedge gate valves are designed for isolation duty, that is to say left in either the fully open or closed positions. Using a gate valve to throttle (or regulate) the follow is likely to cause damage to the seats and/or wedge. Other valve types are more suited to flow regulating or throttling.
Gate valves are not designed for end of line duty. We also recommend the use of a suitability rated blanking flange for such applications.
Have you found what you are looking for? See the rest of our FAQ's or contact us to speak to a member of the team.