SAMOA DF250 NBR DIAPHRAGMS REP.KIT

THE EXCELLENT FLUID COMPATIBILITY OF THIS MATERIAL MAKES IT THE RIGHT CHOICE FOR PUMPING HIGHLY AGGRESSIVE FLUIDS SUCH AS AROMATIC OR CHLORINATED HYDROCARBONS, ACIDS, CAUSTICS, KETONES AND ACETONES.
HOWEVER, PTFE IS AN INELASTIC RIGID MATERIAL.
MOST TRADITIONAL DESIGN DIAPHRAGM PUMPS ARE NOT OPTIMIZED FOR USING DIAPHRAGMS MADE OF PTFE. THE DIAPHRAGMS IN THESE PUMPS ARE RIGIDLY
LINKED TO A TRANSMISSION SHAFT THAT RECIPROCATES WITH LONG STROKES.
THE DIAPHRAGMS ARE SIGNIFICANTLY DEFORMED WITH EVERY STROKE. WHILST THIS DESIGN IS SUITABLE FOR DIAPHRAGMS MADE OF RUBBER OR THERMOPLASTIC
ELASTOMERS.
THE SHORT CYCLE OF LIFE OF PTFE DIAPHRAGMS IN SUCH PUMPS IS UNSATISFACTORY.