EASTERN Centrichem pumps utilize mechanical seals exclusively on all models. Mechanical seals are the preferred sealing method in most applications, and offer many advantages over conventional packed stuffing boxes:
A wide variety of seal configurations provide the best selection of elastomers and mating faces in order to handle a wide range of corrosive liquids.
Type 21 and Type 9 seals cover the widest range of services. These seals are dimensionally interchangeable. They operate in the same manner, using spring tension to keep their stationary and rotating faces in contact.
Primary sealing is accomplished by interaction of the lapped stationary and rotating faces. Secondary sealing occurs at the shaft by means of a tight fitting bellows in the Type 21 design, or a PTFE wedge in the Type 9 arrangement. The final sealing point occurs at the static seat by means of either an elastomeric O-ring or a PTFE ring.
EASTERN Centrichem pumps are available in 316 stainless steel and Alloy C. These materials are suitable for a wide variety of acid and alkali solutions.
EASTERN Centrichem Series ECC1 typical application is for continuous duty general industrial transfer or recirculation of corrosive liquids.
End suction with semi-open impeller close-coupled to mount to any standard 56C motor. Pumps incorporate PTFE O-ring. Pumps incorporate PTFE O-ring seals and will provide smooth stable operation over the entire flow curve. Consult factory for metric motor adapters.
Type 21 mechanical rotary seals with carbon, Viton, and ceramic are standard on all 316 stainless steel pump models. Type 9 seals with chemical-grade carbon, PTFE, and silicon carbide are optional on 316 stainless steel models and standard on Alloy C models. Double Type 9 seals are available in the same materials.
Eastern Centrichem Brochure