IP outlines - check valves?

[Gutta Perka]

On the back of the IP there are four check valves starting the the injectionlines to the motor.

I have some Boschpumps with different check valves.

Are they fitted to the sprayers?

Can I take a set of these checkvalves and interchange with any other Bosch-IP-pumps checkvalves?

They have no number printed on them so they doesen't seem to be correlated to the sprayers.

/Gutta

[burn_your_money]

If you are talking about the delivery valves on the head you shouldn't really mix and match them

[gigaz2]

two types: return flow restriction and constant pressure
the first are used on IDIs and the latest on TDIs.
they have springs and shims to allow them to be tailored to a specific engine.

so... as burn_your_money said