EASTERN Centrichem
Construction: Each Centrichem pump is close coupled for greater strength, and comes ready to mount directly to NEMA 56C or 143/5TC or 182/4C motors. Consult factory for
IEC motor frames. This design eliminates the need for special base-plate mountings, couplings, or complicated drives.
- Pump chambers, rear housings, covers and impellers are all precision castings to ensure that pump walls are smooth. This avoids crevices which can lead to product contamination.
- Precision castings also reduce flow resistance to a minimum. This improves their hydraulic efficiencies to a level unmatched in pumps of this size.
- Generous clearance and the over-hung shaft design of the single-stage pumps enable them to handle corrosive liquidsthat contain low percentages of solids.
- And their mechanical rotary seals make these pumps suitable for extensive applications with acids, alkalis, and solvents.
- For general purpose applications or with excessive amounts of dust, dirt, or similar foreign materials that might harm the motor, we’ll provide totally enclosed motors.
- For hazardous applications involving flammable liquids or vapors we recommend explosion proof motors (approved by Underwriters Laboratories for Class 1 or 2 hazardous locations) equipped with explosion proof junction boxes. Continuous duty motors come standard on our industrial model pumps.
- Air motors are also available.
Operating limits: Eastern® models D&J pumps are rated at temperatures up to 250°F, models C&H can go to 450°F, and viscosities up to 100 centipoises.
Dimensions: This brochure provides dimensional data for pumps with adaptors only. Certified dimension prints for specific pump and motor combinations will be furnished upon request, as motor dimensions vary by manufacturer.
Engineering: Eastern® will modify or adapt our pumps to meet severe or unusual service conditions. Also, we can manufacture specialized pumps to meet specific application requirements. Contact your local Eastern distributor for assistance in determining what‚ if any—modifi-cations you need.
Eastern® CentrichemTM pumps offer the features you need
Eastern® Centrichemtm pumps use state-of-the-art seals 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.
- reduced friction and power loss
- zero leakage of product
- elimination of shaft wear
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. To make sure you select the right seal, careful consideration must be given to the service and operating conditions of each specific application.
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 seat ring.
The Type 9® seal is designed for demanding applications. Its head is fixed to the shaft by anti-rotation pins or set screws, and utilizes a PTFE wedge between the seal ring and shaft. This wedge improves sealing and extends compatibility with most chemicals. All metal components of the seal are either 316
ss or Alloy C. The rotary face is chemical grade carbon or PTFE and the seat is silicon carbide. The Type 9® seal is available in double configuration for more demanding or hazardous applications.
The Type 21® seal is the more economical of the two. It uses an elastomeric bellows to hold it to the shaft and prevent leakage along the pump shaft, and spring tension to maintain proper compression on the seal faces. Chemical compatibility is extensive, as governed by the Viton® elastomer. All metal components of the seal are 316 stainless steel, with a carbon rotary and ceramic seat.
We do not recommend the use of either of these seals with inherently abrasive materials. However, these seals will handle most liquids over an extremely wide range of temperatures (from –10°F to +250°F for a Type 21® seal and from –10°F to +450°F for a Type 9® seal) and pressures (from 25 inches of mercury vacuum to 150 psig for a Type 21® seal and 250 psig for a Type 9® seal).
NOTE: The specific gravity of a liquid affects successful seal operations. Therefore, any liquid whose specific gravity is less than 0.63 should be considered exceptional. In these cases please consult our Sales Engineering Department.
Single-stage pumps
The graphs on the following pages depict the performance ranges for our single-stage pumps, based on clean water at 60°F with flooded suction and 3450 RPM motor operating speeds. Graphs for our multi-stage pumps begin on page 6. Minimum recommended continuous flow is calculated as 10% of the Best Efficiency Point (BEP) flow.
ECD1 (Three Models)
- Applications: For continuous-duty pilot plant, laboratory, and light industrial services. These pumps will handle a variety of liquids (including solvents and corrosive alkali and acid solutions) at modest flow rates and pressures.
- Design: These compact pumps employ open impellers and are close-coupled to the motor drives with cast iron brackets. Consult factory for metric motor adapters.
- Seal: Type 21® mechanical rotary seals with carbon, Viton® and ceramic are standard. Type 9® seals with chemical-grade carbon, PTFE and silicon carbide are optional.
ECC1
- Applications: For continuous-duty general industrial transfer or recirculation of corrosive liquids.
- Design: End suction with semi-open impeller close-coupled to mount to any standard 56C motor. Pumps incorporate PTFE O-ring seals and will provide smooth stable operation over the entire flow curve. Consult factory for metric motor adapters.
- Seal: 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.
ECJ1
- Applications: For continuous-duty industrial transfer,
- OEM equipment, pilot plant operations, or laboratory use where high purity or corrosive service is needed.
- Design: End suction with an open impeller close-coupled to mount to any standard 56C motor. Consult factory for metric motor adapters.
- Seal: Type 21® mechanical rotary seals with carbon, Viton® and ceramic are standard on the single or double configurations. Type 9® single seals with chemical-grade carbon, PTFE and silicon carbide are optional.
ECH1
- Applications: For continuous heavy-duty industrial transfer or process service where corrosion resistance is needed.
- Design: High-efficiency, low-NPSHR end suction with a closed impeller close-coupled to mount to any standard 56C motor. PTFE O-ring seals. Impeller and housing are precision cast for high strength, chemical resistance, and a smooth internal finish. This results in quiet operation and a non-pulsating fluid flow. Consult factory for metric motor adapters.
- Seal: 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.
- Applications: Continuous-duty, high-pressure pumps are used where positive displacement pumps are normally required, but where liquids containing small particles or solids preclude the use of close tolerance units. For transfer, OEM equipment, pilot plant operations, or laboratory use where high purity or corrosive service is needed.
- Design: End suction with an open impeller close-coupled to mount to any standard 56C motor. Consult factory for metric motor adapters.
- Seal: Type 21® mechanical rotary seals with carbon, Viton® and ceramic are standard on the single or double configurations. Type 9® single seals with chemical-grade carbon, PTFE and silicon carbide are optional.
- Applications: For continuous heavy-duty industrial transfer or process service where corrosion resistance is needed.
- Design: High-efficiency, low-NPSHR end suction with a closed impeller close-coupled to mount to any standard 143/5TC or 182/4C motor. PTFE O-ring seals. These heavy-duty units handle high volumes at high pressures under severe operating conditions. Impellers and stages are precision cast for high strength, chemical resistance, and a smooth internal finish. This results in quiet operation and a non-pulsating fluid flow. Consult factory for metric motor adapters.
- Seal: 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.
ECH3
- Applications: For continuous heavy-duty chemical transfer or process service where high head and corrosion resistance are required.
- Design: High-efficiency, low-NPSHR end suction with a closed impeller close-coupled to mount to any standard 143/5TC or 182/4C motor. Pump is also available power frame mounted. PTFE O-ring seals. These heavy-duty units handle flows to 94 GPM at high pressures under severe operating conditions. Impellers and stages are precision cast for high strength and chemical resistance. Maximum standardization of parts minimizes and simplifies maintenance. Consult factory for metric motor adapters.
- Seal: 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.
- Applications: The Eastern® Centrichem5H Model is rated to 94 GPM with a shut off head of 365 ft., for continuous heavy-duty chemical transfer or process service.
- Design: High-efficiency, low-NPSHR end suction with a closed impeller close-coupled to mount to any standard 143/5TC or 182/4C motor. Pump is also available power frame mounted. PTFE O-ring seals. These heavy-duty units handle high volumes at high pressures under severe operating conditions. Impellers and stages are precision cast for high strength and chemical resistance. Maximum standardization of parts minimizes and simplifies maintenance. Consult factory for metric motor adapters.
- Seal: 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.
