Ex-protected metering pumps Ritmo®033 Ex have the same constructive characteristics and high functionality of a dosing pump Ritmo®033. They have an electronically controlled discharge characteristic, can be equipped with stainless steel or PTFE pump heads and achieve a pressure build-up of up to 16 bar.
Ritmo®033 Ex dosing pumps are designed for use in Zone 1 and 2 potentially explosive atmospheres. They are assigned to explosion group IIB and can dose liquid and combustible fluids.
The explosion protection design is based on the type of protection EEx p according to EC Directive 214/34 / EU.
The R05-Ex consists of a pump housing with independent Ex-e approval, an Ex p control unit with flushing and pressure control function, proportional valve technology with automatic leakage compensation.
The pump head, located outside of the Ex-housing, is decoupled from the Ex housing. Leakage of the membrane or rupture of the membrane does not cause dosing liquid or gas to penetrate into the explosion-proof housing.
The pump housing is designed in IP54 and has an Ex-e approval.
A flushing connection is used to pressurize the Ex housing with an overpressure of 12 mbar. For this purpose, air / compressed air or nitrogen is fed into the housing. The overpressure in the pump housing prevents penetration of explosive atmosphere into the pump housing.
An Ex-p control unit in the pump housing with flushing and pressure control function and proportional valve technology with automatic leakage compensation ensure that the housing overpressure is maintained
To the PTFE pump heads are in continuation of highest chemical resistance full PTFE fittings connected with clamping and sealing ring in full PTFE.
Full-PTFE pressure relief valves stabilize the dosing process, especially with swaying back pressures, unpressurized applications or hydrostatic differences between suction and pressure sides.