PROBLEM

PROBABLE CAUSES & SOLUTIONS

Meter lockup / the rotors don't turn

CAUSE A – Strainer basket rupture possibly due to improper maintenance of the strainer basket. If this occurred in a new system, the system may have been improperly flushed.

SOLUTION A – Replace the strainer basket and follow proper strainer maintenance procedures. New systems should be flushed. In all systems, the meter chamber will require cleaning and may require replacement of parts. Refer to the Installation & Operation Guide for meter maintenance procedures, or contact your full service distributor.

CAUSE B – Debris entered the metering chamber, possibly due to improper cleaning during strainer maintenance. (Dirt may have fallen into the strainer housing when the basket was removed for cleaning.)

SOLUTION B – Properly clean the strainer housing as outlined in the Maintenance section in the Installation & Operation topic. The meter chamber will require cleaning and may require replacement of parts. Refer to the Installation & Operation Guide for meter maintenance procedures, or contact your full service distributor.

CAUSE C – Denting or distortion of the strainer basket, which has opened gaps and allowed foreign particles to pass through to the meter chamber. This is usually caused by improper handling of the strainer basket during maintenance.

SOLUTION C – Replace the strainer basket and follow proper strainer maintenance procedures. The meter chamber will require cleaning and may require replacement of parts. Refer to the Installation & Operation Guide for meter maintenance procedures, or contact your full service distributor.

Meter inspection due to meter inaccuracy reveals scoring of the meter chamber.

CAUSE – See the probable causes for the problem above.

SOLUTION – See the solutions for the problem above. However, if inspection does not reveal a ruptured strainer basket and it is known that proper maintenance cleaning procedures were followed, contact your full service distributor.

High pressure drop across the strainer or loss of flow rate.

CAUSE A – Strainer basket screen is partially blocked by foreign material such as dried material or salted out solid particles due to drying.

SOLUTION A – Properly clean the strainer housing as outlined in the Maintenance

section of the Installation & Operation topic. The meter chamber may require cleaning and replacement parts. Refer to the Installation & Operation Guide for meter maintenance procedures, or contact your full service distributor.

CAUSE B – Inner mesh of the strainer basket is not properly sized for viscosity of the product.

SOLUTION B – Replace the strainer basket with a basket correctly suited for the

product.

Leaking at the strainer basket cover.

CAUSE A – The seals are allowing product to leak. This is caused by a damaged o-ring or gasket seal, or reusing a PTFE seal after strainer maintenance.

SOLUTION A – Replace the damaged seals. Replace PTFE seals if they were reused–even if they are in good condition.

CAUSE B – Dirty areas that are preventing the seals from making complete

contact.

SOLUTION B – Clean the strainer housing as outlined in the Maintenance section of the Installation & Operation topic. Remember to replace PTFE seals and never reuse them.