Valve Blocks

If you are a boat owner you will have no doubt heard of the Boat Safety Scheme.

Under current Boat Safety Scheme requirements diesel engines fitted with ‘screw-in’ injectors and rubber ‘push-on’ spill pipes must either have a non-return valve fitted in the return pipe or return to the tank via gravity.

The Valve Block is specially designed for engines which use these rubber hoses to interconnect the injectors as part of the leak off or spill rail system.

Bolted to the injection pump the valve block gives an ideal strong junction for connecting hoses as well as incorporating a non-return valve for spill rail compliance to the Boat Safety Scheme. ( section 2.10.5 )

The Tecky Bit

Surplice fuel coming from the injectors spill pipe goes through the non-return, comprising of a seat, ball and spring. It then joins the main return flow back to the tank.

Valve Block Diagram

The valve block is made from solid aluminium with an anodized coating in different colours for easy type identification, and can be used on both 4, 6 and 8 cylinder engines.

The outlet thread is industry standard and various hose sizes and angles can be accommodated for ease of application. Both valves have the same internal parts.

There are two basic types.

BLUE valve block used on rotary pumps where the return pipe is on the TOP of the injection pump. Typically found on Bosch non turbo and most C.A.V. (Delphi / Roto Diesel) DPC and DPS type of turbo and non turbo rotary pumps.

Blue Valve Block BLUE valve block
Typical application
BLUE valve block typical application
Outline drawing
BLUE valve block outline drawing

GREEN valve block used on rotary pumps where the return pipe is BACK of the injection pump. Typically on Bosch turbo ( including torque control ) pumps

GREEN valve block GREEN valve block
Typical application
GREEN valve block typical application
Outline drawing
GREEN valve block outline drawing

It is maintenance free and is a DIY installation with no special tools or equipment. Each kit comes with full fitting instructions. Please look in the Library for some ‘Before & After’ examples.

Please see the main catalogue for general fittings, filtration equipment and solid spill pipes and miscellaneous items for the engine bay. Please ring to discus any other requirement you may have.