Flowserve Frame mounted Pumps
Flowserve Durco Mark 3 ASME Standard Chemical Process Pump

The Durco Mark 3 pump is recognized worldwide as the premier name in ASME chemical process pumps. Conforming to ASME B73.1 and incorporating many advanced design features, the rugged Mark 3 pump provides unmatched performance and reliability while minimizing the total cost of ownership.

• Brands: Durco, IDP, Flowserve.
• Typical Applications : Acid transfer, Caustic and chlor-alkali, Man-made fibers, Polymers, Slurry processing, Solvents, Volatile organic compounds, Waste processing.

FEATURES

Operating Parameters :

• Flows to 4540 m3/h (20 000 US gpm)
• Heads to 215 m (700 ft)
• Pressures to 27 bar (400 psi)
• Temperatures from -73°C (-100°F) to 370°C (700°F)
• Discharge sizes from 25 mm (1 in) to 200 (8 in)

36 Sizes Available:

• 7 Group 1
• 16 Group 2
• 7 Group 3
• 6 Group 4*
• *Group 4 is not an official ASME B73.1 designation

Features and Benefits :

• Unique Reverse Vane Impeller is the only impeller design that offers repeatable pump performance throughout the life of the pump. Open impellers available.
• SealSentry Seal Chambers feature innovative flow modifiers to extend seal life and provide advanced self-flushing capability.
• External Micrometer Impeller Adjustment accurately sets impeller clearance in 20 seconds, in the shop or the field.
• Largest Shaft and Bearing Components in standard ASME pumps extends bearing life and reduces shaft deflection and vibration.
• Back Pull-out Design allows removal of rotating element without removing casing, piping or motor.
• Heavy-Duty Pump End and Drive End Bearings selected for long life and reliability.
• Reverse Vane Impeller Lowers Total Cost of Pump Ownership.

The Durco Mark 3 pump features a reverse vane impeller for unequaled efficiency and performance. This exclusive Durco design lowers the total cost of pump ownership by easing maintenance and extending bearing and seal life:

• Low, predictable seal chamber pressure and thrust loads.
• Lowest required NPSH of any ASME standard pump.
• Abrasive wear is on the rear cover rather than the more expensive casing.
• In-shop impeller adjustment with the only impeller design that takes full advantage of the back pull-out feature.
• Repeatable performance assurance.

SealSentry Seal Chamber Technology Helps the Bottom Line:

The Durco Mark 3 incorporates SealSentry seal chamber technology. These Vaalar Award winning seal chambers feature unique flow modifiers (FM) which reduce pump operating costs and increase pump availability by:

• Improving mechanical seal performance, reliability and life.
• Reducing maintenance and repair costs.
• Enabling the use of less costly seals and flush plans.

Truest Running ASME Pump:

• The Mark 3 standard pump is engineered with four precision machined metal-to-metal fit locations – more than any other.
• Precision machined metal-to-metal bearing carrier reduces tolerance stack-ups to improve shaft concentricity.
• Superior to jackscrew designs which can cause cocking.
• Extends bearing and mechanical seal life.

Choice of Power Ends:

• Standard Mark 3A power end with double lip oil seals and top vent/breather
• ANSI 3A™ power end featuring Inpro VBXX bearing isolators and a lifetime warranty.