15
Outlet Temperature Adjustment Range
30˚C to 50˚C
Temperature Stability
±2˚C
Maximum Hot Inlet Temperature
85˚C
DO8 Working Pressure Range
0.2 to 1.0 bar : Low Pressure
1.0 to 5.0 bar : High Pressure
Min Temp Differential (Mix to Hot) for Fail-Safe
10˚C
Max. Pressure Inlet Differential
5 : 1
Max. Flow Rate @ 1 bar Differential
Ø15mm 1500 l/hr (25 l/m)
Ø22mm 1700 l/hr (28.3 l/m)
Operating Pressure Range
High Pressure
Low Pressure
Maximum Static Pressure
10 bar
10 bar
Flow Pressure, Hot and Cold
1 to 5 bar
0.2 to 1 bar
Hot Supply Temperature
55˚C to 65˚C
55˚C to 65˚C
Cold Supply Temperature
5˚C to 20˚C
5˚C to 20˚C
NOTE:
Valves operating outside these conditions cannot be guaranteed by the Scheme to
operate as Type 3 valves. See Table 1 on page 6 for Recommended Outlet Temperatures.
Approvals
TMV3 Scheme Approval Number:
Details Available on Request
WRAS Scheme Approval Number:
Details Available on Request
Fail Safe Function
The Twyford thermostatic shower valves are designed to stop the mixed water flow in the event of
either the hot or cold water supply failing when installed in accordance with these instructions. To
ensure full closure of the mixed water flow the minimum temperature differential between the hot
water inlet to the valve and the mixed water outlet
MUST
be at least 10˚C.
installation guide
TMV3
Introduction
The Twyford thermostatic shower valves have been specifically designed and manufactured to
meet the requirements of BS 7942: 2000 and NHS D08. The valve has been independently
tested and approved as a TYPE 3 valve under the TMV3 scheme.
Technical Specification / Conditions for use TMV3 Valves
Twyford TMV3 Thermostatic Shower Valve
