Inter-stage Transfer Pump/Piping for Multi-stage Evaporators

Product Specifications

Technical details and manufacturing context for Inter-stage Transfer Pump/Piping

Definition

The inter-stage transfer pump/piping is a critical component within a multi-stage vacuum evaporator train. It facilitates the movement of partially concentrated liquid from one evaporation stage to the next, ensuring continuous flow through the system. By transferring the product under controlled conditions, often maintaining vacuum, it maintains process efficiency and enables further concentration in subsequent stages. The system typically comprises a pump, such as a centrifugal or positive displacement pump designed for viscous fluids and vacuum service, which creates the necessary pressure differential to move the liquid. The associated piping network, including valves and instrumentation, directs the flow from the discharge of one evaporator stage to the feed of the next. The design must accommodate the fluid's increasing viscosity and solids content as it progresses through the stages. Materials commonly specified include stainless steel (e.g., 316L), duplex stainless steel, and Hastelloy, chosen for corrosion resistance and mechanical strength. Key parameters to consider include flow rate (5–50 m³/h), head (20–80 m), operating pressure (1.0–1.6 MPa), operating temperature (-20–150°C), motor power (2.2–30 kW), voltage (380–690 V AC), ingress protection (IP54–IP65), pipe diameter (DN25–DN100), pipe wall thickness (2.0–6.0 mm), and weight (50–500 kg). These values are reference ranges and must be verified against the specific application and manufacturer data. Standards such as ISO 9906, EN 12516-1, IEC 60034-1, IEC 60038, IEC 60529, ASTM A240, and ISO 4200 are referenced for procurement and verification. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The pump generates a pressure differential that overcomes the inter-stage pressure difference and friction losses in the piping, moving the concentrated liquid from one evaporator stage to the next. The piping network, with valves and instrumentation, ensures controlled flow and maintains vacuum integrity. The system is designed to handle increasing viscosity and solids content, with materials selected for corrosion resistance. Proper sizing of pump and piping is essential to maintain continuous operation and prevent cavitation or excessive wear.

Common Materials

Stainless Steel (e.g., 316L), Duplex Stainless Steel, Hastelloy

Technical Parameters

Parameter	Typical range	Notes & selection driver
Flow Rate	5–50 m³/h	Select based on evaporation capacityISO 9906
Head	20–80 m	Must overcome inter-stage pressure differenceISO 9906
Operating Pressure	1.0–1.6 MPa
Operating Temperature	-20–150 °C	Above 150°C requires special gasket materialEN 12516-1
Motor Power	2.2–30 kW	Match with pump duty pointIEC 60034-1
Voltage	380–690 V AC	Three-phase, 50/60 HzIEC 60038
Ingress Protection	IP54–IP65	IP65 for outdoor or washdown areasIEC 60529
Material	316L	Corrosion-resistant for concentrated liquidsASTM A240
Pipe Diameter	DN25–DN100 mm	Match with pump connectionsISO 4200
Pipe Wall Thickness	2.0–6.0 mm	Pressure rating and corrosion allowanceISO 4200
Weight	50–500 kg	Including pump and baseplate

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Transfer Pump
Provides the motive force to move the viscous, concentrated liquid from one stage to the next.

Material: Stainless Steel Casting/Impeller
Interconnecting Piping Part
Conduit for fluid transfer, designed to minimize pressure drop and accommodate thermal expansion.

Material: Stainless Steel Pipe
Isolation Valve
Allows for maintenance isolation of the pump or piping section.

Material: Stainless Steel
Flow Instrumentation
Measures inter-stage flow and pressure so the transfer can be regulated and cavitation spotted.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Inter-stage Transfer Pump/Piping.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Multi-Stage Vacuum Evaporator Train

View system integration details

Manufacturers of Inter-stage Transfer Pump/Piping

Manufacturer profiles associated with Inter-stage Transfer Pump/Piping.

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Frequently Asked Questions

What is the primary function of the inter-stage transfer pump/piping?

It transfers partially concentrated liquid from one evaporation stage to the next, maintaining continuous flow and process efficiency in a multi-stage vacuum evaporator train.

Which materials are commonly used for this component?

Stainless steel (e.g., 316L), duplex stainless steel, and Hastelloy are typical, chosen for corrosion resistance and mechanical strength.

What are typical flow rate and head ranges?

Flow rate ranges from 5 to 50 m³/h, and head from 20 to 80 m, but these must be confirmed for the specific application.

Why is it important to verify standards and values with the manufacturer?

The listed values are reference ranges; actual requirements depend on the specific evaporator design, fluid properties, and operating conditions. Only the manufacturer can provide validated data.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Vacuum to 10 bar (g), typical operating 0.5-3 bar (g)
flow rate:	5-200 m³/h (typical), depends on evaporator capacity
other spec:	NPSHr < 2 m, materials compatible with corrosive/concentrated liquids
temperature:	50-150°C (typical), up to 200°C with special seals
slurry concentration:	Up to 60% solids by weight, viscosity < 5000 cP

Inter-stage Transfer Pump/Piping

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards