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Engineered specifically for extreme hydraulic resistance and severe system backpressure, the Positive Displacement Pump Resistance maintains linear flow efficiency where standard centrifugal pumps fail due to head loss or cavitation.

Technical Parameter

Operating Viscosity Range	1 cPs to 1,000,000 cPs (Newtonian and Non-Newtonian fluids)
Maximum Discharge Backpressure	Up to 50 Bar (5.0 MPa) continuous
Volumetric Efficiency	≥ 96% under maximum dynamic pipeline resistance
Flow Rates	0.2 m³/h to 220 m³/h (1.00 GPM to 968 GPM)
Temperature Tolerance	-30°C to +320°C (-22°F to 608°F)
Structural Material Options	316L SS, Duplex 2205, Super Duplex 2507, Hastelloy C-276, Cast Steel with Tungsten Carbide coating

Key Technical Features

Anti-Slip Architecture: CNC-machined rotors with micron-level tolerances (IT6–IT7) minimize internal backflow, maintaining ≥96% volumetric efficiency under 50 Bar backpressure.

Shear-Sensitive Fluid Protection: Low-speed cavity displacement (100–400 RPM) preserves delicate fluid structures, preventing degradation of polymers, food concentrates, and emulsions.

High-Suction Capability: Delivers up to 8.5m WC suction lift with low NPSHr to prevent cavitation caused by high inlet pipeline friction.

Shaft Sealing Options

Single Mechanical Seal: Balanced seal face (SiC vs. SiC / Tungsten vs. Tungsten) for non-hazardous viscous fluids.

Double Mechanical Seal with Flush (API 682 Plan 52/53A): Recommended for crystallizing, toxic, or high-temperature media.

Sealless Magnetic Drive: Zero-leakage containment shell design for hazardous chemical transfer up to 25 Bar.

OEM Customization

Feature	Specification & Engineering Details
Target Clients Supported	EPC contractors, pump distributors, and end-user manufacturing plants
3D & 2D CAD Integration	Native 3D CAD (STEP, IGES, SolidWorks) & 2D outline drawings provided within 2 hours of inquiry
Custom Drive Assemblies	Flexible pairing with IEC/NEMA explosion-proof motors, VFDs, gearboxes, or hydraulic drives
Export Packaging Standard	ISPM-15 compliant fumigated wooden crates with internal vacuum-sealed VCI anti-rust protection

Quality Assurance, Testing

Every unit shipped from our facility undergoes comprehensive factory acceptance testing (FAT) to verify pressure integrity and hydrodynamic performance.

100% Hydrostatic Testing: All pressure-retaining pump casings are tested at 1.5 times the maximum rated working pressure for 30 minutes minimum per ISO 5198 standards.

Material Traceability: EN 10204 3.1 Material Test Reports (MTRs) are generated for all wetted castings and shaft forgings, verifying chemical heat composition and mechanical tensile strength.

Quality Management System: Certified under ISO 9001:2015 manufacturing workflows.

Lead Times & Spare Parts

Standard Bare-Shaft Units: 2 to 3 weeks

Custom Metallurgy / Drive Assemblies: 4 to 6 weeks

Emergency Spare Parts: Wear items (rotors, mechanical seals, shafts) dispatched within 48 hours worldwide.

FAQ

Q: How do you determine the correct pump operating speed (RPM) for high-viscosity media?

A: Operating speed is de-rated as viscosity increases to allow full cavity filling. For viscosities of 10,000 to 1,000,000 cPs, speeds are reduced to 100–250 RPM using a gear reducer or VFD.

Q: What over-pressure protection mechanisms must be installed with this pump?

A: Positive displacement pumps deliver constant displacement regardless of pressure. An inline pressure relief valve set to 1.1 times operating pressure or an integrated pump-head bypass valve is required to protect piping and drives.

Q: How does temperature variation impact internal rotor clearances and efficiency?

A: For temperatures above 120°C (up to +320°C), internal clearances are factory-machined with thermal expansion allowances, and heating jackets are used to equalize temperatures prior to startup.

Q: Can this pump handle abrasive suspended solids without rapid wear?

A: Yes. Wetted components receive Tungsten Carbide coatings or hardened Duplex alloys with hard-faced seals (SiC vs. SiC). Operating at 100–200 RPM further minimizes erosive wear.

Q: Is the pump capable of bi-directional operation for line clearing?

A: Yes. Symmetrical rotor architecture allows full performance in both directions, enabling operators to reverse motor rotation to drain residual fluid from supply lines.

Q: How is dry running prevented during initial priming or tank stripping?

A: While offering 8.5m WC suction lift, seals must not run dry. For extended dry suction lift, liquid-flushed dual seals (API Plan 52/53A) or sealless magnetic drives are mandatory.

Q: Can third-party inspections (TÜV, SGS, Bureau Veritas) be conducted prior to shipment?

A: Yes. Third-party inspectors can witness FAT, verify hydrostatic pressure charts (1.5x working pressure), review EN 10204 3.1 MTRs, and inspect export packaging.

Q: What piping interface options are available for legacy plant retrofits?

A: Factory-machined transition spools, companion flanges, and custom threaded adaptors can be produced directly to client piping drawings alongside ANSI, DIN, and Tri-Clamp connections.

Q: What API 682 seal flush plans are supported for toxic or volatile media?

A: We integrate Plan 11 (internal recirculation), Plan 52 (unpressurized buffer fluid), and Plan 53A (pressurized barrier fluid) seal piping to guarantee zero environmental leakage up to 25 Bar.

Q: What routine maintenance is required for continuous 24/7 high-pressure duty?

A: Check gear reducer oil every 2,500 hours, monitor seal flush barrier pressure weekly, and inspect bearing clearances annually. All wear components can be serviced in-line without removing the casing.

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