Industrial Chemical Process and Transfer Pumps

JUSH supplies 12 chemical process and transfer pump series covering horizontal centrifugal, fluoroplastic, stainless steel, duplex stainless steel, mixed-flow, forced-circulation and high-pressure plunger pump designs.

The current range includes CZ, IHF, IH, AFB, FB, KF, IJ, CPN, CP, SPP, CXHP and petrochemical process pump series. These pumps serve industrial liquid-transfer, process-circulation, alkali-handling and corrosion-control duties.

Chemical compatibility is determined by the complete wetted-material configuration, chemical name, concentration, operating temperature, pressure, viscosity, solids content and shaft-seal arrangement. A general material category does not establish universal compatibility with every acid, alkali, salt solution or solvent.

JUSH Chemical Pump Product Range

The individual product pages provide model-specific flow, head, temperature, pressure, motor and dimensional data.

Chemical Pump Categories

Horizontal Chemical Process Pumps

The CZ series is the published horizontal chemical process pump in the current range. Its product page specifies a horizontal back-pull-out structure with the pump and motor connected by a coupling on a common baseplate.

The published CZ performance range is:

The CZ page also identifies:

• Rear-open impeller arrangement

• Three-bearing structure

• External mechanical seal

• Cooling arrangement

• Oil-level sight glass

• Clockwise rotation when viewed from the motor end

• Back-pull-out maintenance without disconnecting the pump casing from the process piping

These specifications belong only to the CZ series and are not applied to every product in the chemical-pump category.

ZA, ZE and ZAO Petrochemical Process Pumps

The JUSH technical manual identifies the ZA, ZE and ZAO series as single-stage, horizontal, radially split volute-casing petrochemical process pumps with axial suction and radial upward discharge.

The manual states that the series was designed according to:

• API 610, 8th edition

• VDMA 24297 light- and medium-duty specifications

The published series operating envelope is:

The manual identifies these structural features:

• Single-entry radial impeller

• Foot-supported pump casing

• Front or rear wear rings

• Hydraulic balance holes

• Packing, single mechanical seal or double mechanical seal

• Cooling, flushing and sealing-liquid connections

• API piping plans

• DIN or ANSI flange arrangements

• Closed or open impeller construction

• Replaceable casing wear ring, impeller wear ring and shaft sleeve

• Oil-lubricated heavy-duty bearing bracket

• Shaft deflection at the seal position below 0.05 mm

• Open-impeller handling of liquid containing solid particles up to 10% concentration

The published applications include refineries, petrochemical processing, coal processing, chemical processing, paper and pulp, sugar production, seawater desalination, power generation, environmental engineering, ships and offshore installations.

Fluoroplastic Chemical Pumps

The IHF is the fluoroplastic-alloy product in the current chemical-pump category. Fluoroplastic construction is used where the complete wetted material is compatible with the specified chemical.

The product data for an IHF enquiry includes:

• Exact fluoroplastic or lining grade

• Casing backing material

• Impeller material

• Shaft and shaft-sleeve material

• Mechanical-seal face materials

• O-ring and gasket materials

• Chemical name

• Chemical concentration

• Continuous and maximum temperature

• Presence of crystals or suspended solids

The term “fluoroplastic” is not used as a universal compatibility statement.

Stainless Steel Chemical Pumps

The current range includes CPN, AFB, KF and CP stainless steel products. The IH series is separately identified as a duplex stainless steel chemical pump.

The individual stainless steel grade is displayed at product level. The terms “stainless steel,” “304,” “316L” and “duplex stainless steel” are not treated as interchangeable because they have different chemical and chloride resistance.

Mixed-Flow and Forced-Circulation Pumps

The SPP is the mixed-flow forced-circulation pump in the current range. The CP is identified as a stainless steel food-grade mixed-flow pump.

Mixed-flow and forced-circulation duties are kept separate from standard centrifugal-transfer-pump duties. Their pages contain the model-specific circulation flow, head, connection, motor and material information.

High-Pressure Plunger Pump

The CXHP is an axial high-pressure plunger pump. It is not presented as a centrifugal chemical pump.

The product page defines its pressure, flow, drive, seal and liquid requirements independently from the centrifugal and mixed-flow series.

Material and Chemical Compatibility

Chemical-pump material selection is based on the full wetted-material list rather than the casing name alone.

The assessment includes:

• Casing

• Impeller

• Shaft

• Shaft sleeve

• Wear rings

• Mechanical-seal faces

• Seal metal parts

• Elastomers

• Gaskets

• Bearings exposed to the liquid

• Flush and cooling connections

The operating data includes the chemical name, concentration, temperature, pressure, viscosity, density, solids content and tendency to crystallize.

Published Material Groups

The current JUSH product range includes these clearly identified material groups:

• Stainless steel

• Duplex stainless steel

• Fluoroplastic alloy

• Corrosion-resistant metallic construction

Each group links directly to the corresponding product series. Material suitability is stated at product level rather than applied to the entire category.

How a Chemical Process Pump Works

A chemical process pump transfers energy from the motor to the pumped liquid through an impeller or another displacement mechanism.

In a centrifugal process pump, liquid enters the impeller near the shaft axis. The rotating impeller increases liquid velocity, and the casing converts part of that velocity into pressure before the liquid reaches the discharge connection.

In a plunger pump, the reciprocating displacement of the plunger creates suction and discharge cycles. This construction provides a different relationship between flow and pressure from a centrifugal pump.

Mixed-flow pumps generate flow through a combination of radial and axial hydraulic forces and are used for high-circulation duties with comparatively lower developed head.

Engineering Data Used for Pump Sizing

Every chemical-pump quotation is based on:

• Required flow rate in m³/h

• Required total head in metres

• Suction pressure

• Discharge pressure

• Operating and maximum pressure

• Chemical name

• Chemical concentration

• Continuous and maximum temperature

• Density

• Viscosity

• Vapour pressure

• Solids concentration

• Maximum particle size

• Crystallization behaviour

• Corrosion characteristics

• Required NPSH margin

• Continuous or intermittent operation

• Required shaft-seal arrangement

• Flush or cooling arrangement

• Motor voltage, frequency and phase

• Hazardous-area motor classification

• Connection standard

• Installation environment

These values establish the pump series, hydraulic model, motor power, material and shaft-seal configuration.

Shaft-Seal Arrangements

The published CZ series uses a mechanical seal or packing seal. The ZA/ZE/ZAO manual specifies packing, single mechanical seal and double mechanical seal arrangements, together with cooling, flushing or sealing-liquid connections.

The shaft-seal system is matched to:

• Liquid toxicity

• Flammability

• Vapour pressure

• Temperature

• Solids content

• Crystallization

• Required leakage control

• Available flush liquid

• Operating pressure

The category page does not claim that all chemical pumps are leak-free. That wording belongs only to designs whose complete containment and sealing arrangement supports it.

Installation and Operation

Chemical pumps are installed on a rigid, level foundation with correctly aligned pump and motor shafts. Piping is independently supported so that nozzle loads are not transferred to the pump casing.

The operating procedure includes:

• Cleaning the suction and discharge lines before startup

• Filling and venting the pump casing

• Opening the required cooling and flush connections

• Checking the direction of rotation

• Confirming that the suction valve is open

• Starting the pump with the discharge valve in the prescribed position

• Recording flow, pressure, motor current, vibration and bearing temperature

• Keeping operation within the published performance range

• Preventing dry running

• Preventing extended operation against a closed discharge valve

• Stopping the pump immediately after loss of flow, abnormal vibration, leakage or rapid temperature rise

Chemical Pump Maintenance

Routine inspection includes:

• Mechanical-seal leakage

• Packing leakage and gland adjustment

• Shaft-sleeve condition

• Bearing temperature

• Bearing lubrication

• Coupling alignment

• Impeller and wear-ring clearance

• Casing corrosion

• Gasket and elastomer condition

• Cooling and flush passages

• Motor current

• Suction and discharge pressure

• Vibration

• Foundation fasteners

• Process-pipe supports

Maintenance records contain the pump model, serial number, chemical handled, concentration, temperature, operating hours, inspection findings and replaced parts.

Frequently Asked Questions

What is a chemical process pump?

A chemical process pump transfers process liquids whose corrosion, temperature, pressure, viscosity or containment requirements exceed those of a general clean-water pump.

How many chemical pump series are listed by JUSH?

The current JUSH Chemical Pumps category lists 12 product series across two paginated pages.

What is the published CZ chemical-pump range?

The CZ series product page publishes a flow range of 1.6–2,000 m³/h, a head range of 5–160 m, maximum working pressure of 1.6 MPa and operating temperature from -20°C to +150°C.

What is the published ZA/ZE/ZAO range?

The JUSH ZA/ZE/ZAO manual publishes sizes from 25 to 400 mm, capacities up to 2,600 m³/h, heads up to 250 m, working pressure up to 2.5 MPa and a standard operating-temperature range from -20°C to +180°C.

Which JUSH series is fluoroplastic?

The IHF is the fluoroplastic-alloy chemical pump listed in the current Chemical Pumps category.

Which series uses duplex stainless steel?

The IH series is listed as the duplex stainless steel chemical pump.

Can every chemical pump handle sulfuric acid?

No. Sulfuric-acid compatibility depends on concentration, temperature, water content, impurities and the complete wetted-material configuration.

What information is required for a chemical-pump quotation?

The quotation is based on flow, head, chemical name, concentration, temperature, density, viscosity, vapour pressure, solids content, suction conditions, shaft-seal arrangement, motor requirements and pipe connections.