Sigma warranty 2.2.6Diaphragm rupture sensor, Product description S2Ba/S2Ca

Product description S2Ba/S2Ca Dulcodes UV-Desinfektionsanlage

Technical data

Corresponding to the type of pump, overflow valves are available for pressure stages pnom 4, 7, 10, 12 and 16 bar with (1.05 ... 1.15) xpnom opening pressure.

Material in contact with metered medium

Material	Liquid end	Suction/	Seals	Balls	Springs	Integrated
version		discharge				overload
		connector				valve
PVT	PVDF	PVDF	PTFE	Ceramic / glass*	Hastelloy C	PDFE/Viton®
SST	Stainless steel	Stainless steel	PTFE	Stainless steel	Hastelloy C	Stainless steel/
	1.4571/1.4404	1.4581		1.4404		Viton®

*for 07120, 07220, 04350

Viton® is a registered trademark of DuPont Dow Elastomers.

Use for intended purpose/Use unintended purpose

Use for intended purpose

Protect the dosing pump against unacceptable high overpressure produced by the dosing pump. Use the overflow value only in connection with liquid with a viscosity of up to max. 200 mPa s.

IMPORTANT

¥The ceramic ball and ball seat of the overflow valve are wearing parts. Slight leakage can occur at the safety valve after a prolonged period of operation. The ball and ball seat should be replaced if leaks occur.

¥The bypass line must always be connected and must be routed back into the supply tank. Use for unintended purpose

To protect the system from impermissible overpressure.

The pump must not be operated without the bypass line connected.

The bypass line must not be connected in the intake line (the bleeder function will no longer be guaranteed). The bypass line must be routed back into the supply tank.

WARNING

When carrying out maintenance work on the overcurrent valve, pay attention to the tensioned state of the pressure spring item132! Wear safety goggles!

2.2.6Diaphragm rupture sensor

Function:

Monitors the seals in the working diaphragm. This liquid end can continue to function for a short period in emergency mode, i.e. full operating pressure, no leakage, even after diaphragm rupture.

Design and function description (see Fig. 8)

Liquid ends with diaphragm rupture sensors comprise a standard liquid end (item 100) a working diaphragm (item 200) and an auxiliary diaphragm (item 148) The auxiliary diaphragm is positioned between the back plate (item 201) and the interim plate (item 147) and forms a sealed compartment together with the working membrane (item 200).

The leak tightness of the working diaphragm, Item 200, is monitored with a diaphragm failure detector, Item 104, that triggers a contact signal in the event of diaphragm failure so that the pump is stopped in the S2Ca and the diaphragm failure is indicated on a LCD.

Page 22 ProMinent®