Nippon TOP-N350HVB-VF Trochoid Pump
$3,899.00
Condition: New – Open Box
1 in stock
Nippon TOP-N350HVB-VF Trochoid Pump
The Nippon Oil Pump (NOP) TOP-N350HVB-VF is an industrial-grade, positive displacement cycloidal/trochoid pump engineered for high-duty lubrication, hydraulic power delivery, and low-to-medium viscosity oil circulation. Designed around an internal gerotor gear profile, this pump delivers smooth, continuous flow without pulsation, ensuring low cavitation risk and minimal operational noise under continuous operational loads.
The pump incorporates an integrated adjustable mechanical relief valve (VB) and factory-configured Fluorocarbon/Viton seals (VF), delivering chemical stability and thermal resistance for demanding marine machinery spaces, heavy machine tool hydraulics, turbine reduction gears, and marine power transmission systems.
Model Details
- Brand / Manufacturer: Nippon Oil Pump Co., Ltd. (NOP)
- Base Series: TOP-N3H Medium/High-Pressure Trochoid Series
- Model Code: TOP-N350HVB-VF
- Manufacturer Part Number (MPN): TOP-N350HVB-VF
Technical Specifications: Nippon TOP-N350HVB-VF
| Parameter | Technical Specification |
|---|---|
| Pump Type | Internal Gerotor / Positive Displacement Trochoid Pump |
| Theoretical Displacement | 65.0 cm³/rev (cc/rev) |
| Theoretical Discharge @ 1500 RPM (50 Hz) | 97.5 L/min |
| Theoretical Discharge @ 1800 RPM (60 Hz) | 117.0 L/min |
| Maximum Discharge Pressure | 2.0 MPa (20 bar / ~290 PSI) |
| Maximum Operating Speed | 1,800 RPM |
| Direction of Rotation | Clockwise (CW) viewed from the shaft end |
| Suction Port (Inlet) Connection | Rc 1-1/4″ (Tapered Internal Pipe Thread) |
| Discharge Port (Outlet) Connection | Rc 1″ (Tapered Internal Pipe Thread) |
| Internal Relief Valve | Integrated adjustable bypass valve (Standard range: 0.1 – 0.5 MPa / High-pressure option) |
| Shaft Seal Material | Fluorocarbon Rubber (FKM / Viton) |
| Applicable Fluid Viscosity Range | 10 to 500 mm²/s (cSt) at operating temperature |
| Operating Fluid Temperature Range | -10°C to +120°C (14°F to 248°F) |
| Net Dry Weight (Bare Shaft Pump) | Approx. 15.9 – 16.2 kg (35.7 lbs) |
| Shaft Configuration | Straight cylindrical keyed drive shaft |
Key Features
- Pulse-Free Fluid Delivery: Internal trochoidal rotor geometry minimizes flow fluctuation and fluid shear, eliminating pressure ripples in sensitive hydraulic circuits.
- Integrated Safety Bypass Valve (VB): Protects downstream piping and electric motor drives from catastrophic overpressurization via an internal, field-adjustable relief valve mechanism.
- High-Temperature Viton Elastomers (VF): Equipped with FKM shaft seals rated up to 120°C (248°F), providing resistance to synthetic lubricants, mineral oils, and aggressive additives.
- Cast Iron Mechanical Construction: Wear-resistant cast iron casing (FC200) and precision-ground alloy steel rotors provide tight volumetric tolerances and resistance to abrasive degradation.
- Flexible Coupling Configuration: Standard keyed cylindrical drive shaft accommodates standard IEC and NEMA motor mounting flanges via flexible spider couplings.
Equipment Compatibility & Marine Systems
- Marine Auxiliary Engines & Gensets: Lubrication and pre-lubrication systems on Daihatsu, Yanmar, MAN B&W, and Wärtsilä auxiliary diesels.
- Marine Reduction Gearboxes: Continuous oil cooling, spray lubrication, and clutch actuation pumps for Reintjes, Renk, and ZF marine transmissions.
- Hydraulic Power Packs (HPU): Low-to-medium pressure supply loops, steering gear hydraulic charge systems, deck machinery winches, and mooring systems.
- Industrial Heavy Machinery: CNC machining center spindle lubrication, central plant lubrication units, turbine gearboxes, and large forging press loops.
Applications
- Forced-Feed Lubrication: Delivering clean, steady lubricating oil to hydrodynamic bearings, crossheads, and main journals.
- Hydraulic Fluid Transfer: Circulation and boost circuits in closed-loop or reservoir-based hydraulic systems.
- Oil Filtration & Cooling Loops: Low-shear transfer pump for external plate-type heat exchangers and multi-stage duplex filtration skids.
- Gearbox Fluid Circulation: Continuous spray and splash lubrication for marine propulsion reduction gears and industrial mills.
Frequently Asked Questions
What does the “VF” suffix designate on the TOP-N350HVB-VF?
The “VF” designation specifies factory-installed Fluorocarbon (FKM/Viton) elastomers instead of standard Nitrile (NBR) rubber. This upgrade provides chemical resistance to synthetic lubricants, aggressive detergents, and high fluid temperatures up to 120°C.
Can the TOP-N350HVB-VF operate in both clockwise and counter-clockwise directions?
The standard TOP-N350HVB-VF is directional and configured for clockwise (CW) rotation when viewing the pump drive shaft end. Operating the pump in reverse will reverse the suction and discharge ports and prevent the integrated internal relief valve from operating correctly.
What is the maximum recommended suction lift for this pump?
For optimal volumetric efficiency and seal life, keep the total suction vacuum below -0.03 MPa (-0.3 bar / ~8.8 inHg). If positive displacement suction lift exceeds this limit, install the pump flooded below reservoir fluid level.
How do I distinguish between the TOP-N350H and the TOP-N350HVB?
The H version is a bare high-pressure pump without an internal bypass mechanism, requiring an external relief valve in the piping circuit. The HVB variant features an integrated relief valve built into the pump cover.
What oil viscosity range can this trochoid pump handle?
The pump handles fluid viscosities between 10 and 500 mm²/s (cSt). For optimal mechanical efficiency and lowest noise output, maintain operating viscosity in the 20 to 150 cSt range.
14 DAYS RETURN POLICY
RETURNS ARE ACCEPTED IN 14 DAYS. BUYER PAYS THE SHIPPING CHARGES. RESTOCKING FEES 20%.
NOTE:
IF THE ITEM COMES UNDER CUSTOMS, THE BUYER WILL BE FULLY RESPONSIBLE FOR DUTIES AND OTHER CHARGES. WE, AS THE SELLER, DO NOT ACCEPT RETURNS OR REFUNDS IN THIS CASE. KINDLY CONNECT WITH US BEFORE PURCHASING AN ITEM OR IF YOU HAVE ANY OTHER QUERIES.
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