Overfill Prevention Valves

Our high quality and feature packed RIS-STOP range is:

‘Fail-safe’
Normally closed
Testable during a normal delivery
Suitable for all retail fuels
Available for other fluids and aviation fuels

Several models of the 2″ Valve are available for different oils and fluids not suitable for petroleum spirit.

The 3″ Pressure and 4″ Gravity Valves are modular and the build is dependent on Base and Inlet fittings, type of drop tube supplied, accessories like RIS-DIFFUSER and RIS-ATV – our powerful pairing of products to prevent foaming in diesel tanks and vapour generation and loss in petroleum fuel tanks.

There are Part Number Matrixes for 3″ Pressure and 4″ Gravity valves to allow you to request a price for your particular application available in our Resources area.

2-inch RIS-STOP
3-inch RIS-STOP (3P)
3-inch RIS-STOP (3SF)
4-inch RIS-STOP (3GF)
Overfill Valve Tees

2-inch RIS-STOP-2SF-R

Suitable for above ground commercial diesel storage installations, and pressure deliveries. It incorporates many proven RIS-STOP features and now includes a more compact 4-bolt flanged inlet on the body allowing greater maximum tank fluid levels.

Cartridge construction for easy installation and access via the 2” tank lid socket supplied
Very high flow capacity (50% greater than some competitive products)
Effective at low flow rates (10-600 l/m) pressure delivery up to 8 bar maximum
Various other configurations of this valve are available
On-site inspection and testing via access cap without pipework dis-assembly
No dynamic seals – promoting long service life
Acts as anti-syphon valve in normally closed position
Suitable for fuels of SAE10 or lower (other models available for higher viscosity)
Compatible with all pipe-work brands
Flexible connectors available: make fitting/servicing easier, remove stress from pipework

Also available for Heavy oils:
RIS-STOP2SF-R-03 for SAE50 Grades or Equivalent.

Materials:
Anodised Aluminium
Viton A (FKM)
Stainless Steel
HDPE Closed cell foam

Suitable for:
Diesel
BioDiesel / FAME Blends

IMPORTANT NOTE:
The RIS-STOP family of valves are not suitable
alternatives for true “shut-off valves” and must
not be used in continuously pressurised systems.

3-inch RIS-STOP (3P)

The only fail-safe, normally closed and testable mechanical valve available. This valve is part of our RIS-STOP range of above and below ground tank Overfill Prevention Valves.

The range includes valves suitable for pressure and gravity fill deliveries. For use with a wide range of fuels, oils and fluids. This product is part of the RIS-FLANGE™ Tanklid fittings range, designed to make Forecourts easier and quicker to install, as well as improving standards, decreasing the probability of leaks, and making testing and maintenance easy and safe.

For further information about the RIS-STOP-3P series please contact us.

3-inch RIS-STOP (3P) Variants

Variant

RIS-STOP-3P-T200

Description

This RIS-STOP-3P model is composed of the following parts:

3″ BSPP threaded base valve module
2″ BSPT threaded base float module with 305mm float tube

RIS-STOP-3P-T210

This RIS-STOP-3P model is composed of the following parts:

3″ BSPP threaded base valve module
2″ BSPT threaded base float module with 305mm float tube
2 metre drop tube

RIS-STOP-3P-T220

This RIS-STOP-3P model is composed of the following parts:

3″ BSPP threaded base valve module
2″ BSPT threaded base float module with 305mm float tube
4 metre drop tube

RIS-STOP-3P-T240

This RIS-STOP-3P model is composed of the following parts:

3″ BSPP threaded base valve module
2″ BSPT threaded base float module with 305mm float tube
4 metre drop tube and diffuser

RIS-STOP-3P-T440

This RIS-STOP-3P model is composed of the following parts:

3″ BSPP threaded base valve module
2″ BSPT threaded base float module with 1200mm float tube
4 metre drop tube and diffuser

3-inch RIS-STOP-3SF

Suitable for above ground commercial diesel pressure delivery storage installations. Incorporates many proven RIS-STOP features and includes a compact 4-bolt flanged inlet on the body allowing greater maximum tank fluid levels.

Cartridge construction for easy installation and access via the 3” tank lid flange supplied
High flow capacity
Effective at low flow rates (10-600 l/m) Pressure delivery up to 8 bar maximum
On-site inspection and testing via access cap without pipework dis-assembly
No dynamic seals – promoting long service life
Acts as anti-syphon valve in normally closed position
Suitable for fuels of SAE10 or lower (other models available for higher viscosity)
Compatible with all pipe-work brands
Flexible connectors available: make fitting/servicing easier, remove stress from pipework
Available in threaded or flange fit options

Materials:
Anodised Aluminium
Viton A (FKM)
Delrin (polyacetal)
Stainless Steel
HDPE closed cell foam

Suitable for:
Diesel
BioDiesel / FAME Blends

4-inch RIS-STOP (3GF)

For 4″ gravity fill installations our proven RIS-STOP-3GF range of valves provides variants for all types of tank lid and pipework configurations.

Lower installation costs, can be assembled into tanks at factory
Reduce vapour growth, fuel aeration and turbulence with optional Diffuser and Air Transfer Valve
Normally closed valve, suitable for gravity fill installations
The ONLY fail-safe mechanical valve available
THE ONLY in-situ testable valve available
High gravity flow rates up to 1025 litres per minute
The ONLY valve operating effectively at very low flow rates (10 litres / minute)
Operating pressure range 0.1 – 2 Bar, Flow operating range 10 – 1025 litres / minute)

Certification: ATEX / SIRA 08ATEX9345 TYPE A1 EN13616:2004

4-inch RIS-STOP (3GF) Variants

Variant

RIS-STOP-3GF-F223

Description

This RIS-STOP-3GF model is composed of the following parts:

4″ Flanged base Valve Module (to suit 4″ port on RIS-FLANGE™ Tanklids)
2″ Flanged base Float Module (to suit 2″ port on RIS-FLANGE™ Tanklids)
3.5 metre drop tube with Air Transfer Valve and Diffuser
4″ to 3″ eccentric Flex Connector

RIS-STOP-3GF-T123

This RIS-STOP-3GF model is composed of the following parts:

4″ BSPT Threaded base Valve Module
2″ BSPT Threaded base Float Module
3.5 metre drop tube with Air Transfer Valve and Diffuser
4″ to 3″ eccentric Flex Connector

RIS-STOP-3GF-T314

This RIS-STOP-3GF model is composed of the following parts:

4″ BSPT Threaded base Valve Module
2” BSPT threaded with 1200mm float tube
Stub drop tube (for special applications only)
3″ to 3″ Flex Connector

RIS-STOP-3GF-T514

This RIS-STOP-3GF model is composed of the following parts:

4″ BSPT Threaded base Valve Module
2” BSPT threaded with 305mm float tube
Stub drop tube (for special applications only)
3″ to 3″ Flex Connector

Overfill Valve Tees

These tees have a flanged base, are precision machined from aluminium and are then anodised.

With an integral drop tube retaining cage, and optional test blank, they provide all you need to reliably and easily fit Drop tube mounted, float operated overfill prevention valves.

Available in several styles for RIS-FLANGE™ tanklids and for normal threaded port applications:

RIS-FLANGE4-TEE Flanged Version

RIS-FLANGE4-TEE-R2-MK2 Flanged with 4″ male BSP adaptor

TESTING PLUG:

RIS-FLANGE4-TEE-TEST

Click here to see more about our Fill Tees and OPDs – Risbridger

2-inch RIS-STOP