ATEX pumps for explosion-protected zones

Pumps are a potential source of ignition during operation. The main ignition sources are hot surfaces, mechanically triggered sparks or electrostatic discharges. SAWA ATEX pumps of category 2 and 3 are designed to ensure a high level of safety during intended operation.

SAWA ATEX pumps comply with the Explosion Protection Directive 2014/34/EU and are approved for zones 1/21 and 2/22. Dry running must be avoided at all costs, as otherwise impermissibly high temperatures can occur within a short time.

The following measures can be taken to prevent impermissible operating conditions (e.g. motor overload or dry running):

Monitor current consumption
Dry-running protection by means of Liquiphant
Temperature monitoring on the can or mechanical seal
Use of double-acting mechanical seal in tandem or back-to-back arrangement
Pressure monitoring at the discharge nozzle
Flow monitor

Design option for ATEX pumps

Category 2 - high security

ATEX Zone 1 and 21

Bearing bracket design with double-acting mechanical seal
Magnetic coupling

Category 3 - normal safety

ATEX Zone 2 and 22

Bearing bracket version with single-acting or double-acting mechanical seal
Close-coupled pump with stub shaft with single-acting or double-acting mechanical seal
Magnetic coupling

The ATEX marking of SAWA ATEX pumps is as follows: II 2G Ex h IIC T6...T4 Gb

Motors

With flameproof enclosure EEx de IIC T4 (e.g. for operation with frequency inverter) for zones 1 and 2 or
EEx e II T3 for zones 1 and 2

Other motor types are also available on request.

Side channel pump HDP160/2-MW

Maximum process reliability with the mobile SAWA side channel pump in ATEX design, with dry-running protection and intelligent control.

Reliability, safety and efficiency are crucial in demanding applications in the pharmaceutical, chemical and food industries. With our mobile, self-priming SAWA side channel pump, we have created a reliable complete solution for use in potentially explosive atmospheres thanks to its integrated dry-running protection. The pump with intelligent control for monitoring and regulation offers numerous highlights and protective functions for maximum process reliability:

Mobile, self-priming pump, with control unit and manual operating elements
Pump in pharmaceutical design, with SAWA residual discharge valve RE15 and surface roughness Ra < 0.4μm
SAWA residual emptying valve RE15 for complete emptying
ATEX version (bearing bracket design) for use in potentially explosive atmospheres
Dry-running protection to prevent damage, e.g. due to incorrect operation
Speed control, for flow rate control and optimization of the operating process
Temperature monitoring of motor and control unit to protect against overheating in the event of overload
Motor current monitoring with I²t limitation, for overload protection
Overvoltage and undervoltage protection, for protection against voltage fluctuations
Short-circuit and earth fault protection to maximize operational safety
Blockage detection, to detect blockages and protect against mechanical damage
Tilt protection, to ensure the stability of the pump, even under extreme operating conditions
Process control with PID controller, for precise regulation and control of the process
PID dry-running protection, with integrated protection mechanism for additional safety