Our high-quality control valves are made from stainless steel and ductile iron, suitable for potable water, oil, air and fluids up to 60°C.
Our pressure reducing valves and pressure relief valves are designed to prevent pressure surges and water hammer, protecting pipelines, pumps and other critical components from damage.
Our float valves, also known as level control valves, provide automatic liquid level control for tanks, reservoirs and other vessels, ensuring optimal fluid management in a variety of applications.
A pressure control or pressure relief valve prevents system pressure from exceeding a pre-set value. This protects pipes, valves, pumps and other components from damaging overpressure events such as pressure surges and water hammer, and maintains a consistent pressure rating to ensure hydraulic efficiency for increased system performance and reliability.
What is a float valve?
Float valves, also known as level control valves, are used for automatic level control within tanks, cisterns, reservoirs and other vessels.
Pressure Control Valve & Float Valve FAQs
What is a pressure control valve?
A pressure control or pressure relief valve prevents system pressure from exceeding a pre-set value. This has two benefits:
Protects pipes, valves, pumps and other components from damaging overpressure events such as pressure surges and water hammer.
Maintaining a consistent pressure rating ensures hydraulic efficiency for increased system performance and reliability.
Can control valves be used as isolation valves?
Some models of control valves allow for complete open/closed adjustment in a pipeline, however specifically designed isolation valves will operate the most efficiently.
What are the main types of pressure control valves?
T-T Flow supplies two main kinds of pressure control valves:
Pressure relief valves divert excess fluid through a flanged outlet to prevent pressure from rising above preset levels, ensuring system safety by protecting against overpressure conditions.
Pressure reducing valves reduce downstream pressure to a set level by throttling upstream flow, maintaining consistent and safe pressure levels in the system.
How do pressure control valves work?
Pressure relief valves – When system pressure rises above a pre-set value, our fast-acting relief valves divert excess fluid through a flanged outlet to prevent damage from a pressure surge.
Pressure reducing valves – Our pressure reducing valves contain a spring that the user pre-sets to throttle upstream flow to a desired outlet pressure for consistent downstream flow.
What causes pressure build-up in a system?
Pressure can build-up in a system for a number of reasons:
Trapped air
Blockages, sedimentation and solids accumulation
Temperature changes
Changing fluid demand
What is a float valve?
Float valves are designed to automatically regulate flow into tanks to maintain a consistent liquid level.
The float attached to the valve rises and falls with the liquid in the tank, opening and closing the valve at pre-set levels to prevent overflow when levels are high and refill the tank when levels are low.
How do float valves work?
Level control valves use mechanical floats connected to a lever that open and close the valve as the float rises and falls, stopping or allowing the inflow of liquid based on a pre-set level.
Float control valve applications
Water tanks
Reservoirs
Industrial processes
Wastewater treatment plants
Case Studies
Fast-Acting Relief Valves to UK First Sludge Treatment Facility
T-T Flow supplied essential pressure relief valves as part of a UK first sludge treatment centre retrofit in Greater Manchester.
The facility was upgraded with a new biogas production technology that increased green energy output and needed fast-acting relief valves for critical pressure management.
Specialist Valve Package for the Birmingham Resilience Project
As part of the Birmingham Resilience Project, Severn Trent Water’s largest project to date, T-T Flow supplied multiple metal seat gate valves and pressure reducing valves for effective flow control.
The £300 million scheme will ensure Birmingham has a back-up drinking water supply during maintenance works to the Elan Valley Aqueduct which has fed the city for over 100 years.
