Taiko Kikai MSHS-20 Horizontal Three Rotor Screw Pump

Taiko Kikai MSHS-20 Horizontal Three Rotor Screw Pump

The Taiko Kikai MSHS-20 is a commercial, horizontal positive displacement three-rotor screw pump for high reliability marine and heavy industrial fluid transfer applications. The pump is made by Taiko Kikai Industries Co., Ltd., in Japan and has a single precision-machined center power rotor and two hydraulic pressure-driven idler rotors housed in a high-grade structural casing.

The MSHS-20 is designed for the smooth, pulse-free distribution of lubricating oils, fuel oils and other self-lubricating viscous fluids with minimal mechanical vibration, acoustic noise and fluid shearing. The hydraulic balancing configuration offers long service intervals with no axial thrust wear for continuous duty operation in engine rooms and industrial plant settings.

Model Details

• Manufacturer: Taiko Kikai Industries Co., Ltd.
• Model Designation: MSHS-20
• Pump Type: Horizontal Three-Rotor Screw Pump
• Manufacturer Part Number (MPN): MSHS-20
• Product Condition: New Unused Surplus

Technical Specifications: Taiko Kikai MSHS-20

Key Features

1. Pulse-Free Fluid Displacements: The precision meshing profile of the single power rotor and twin idler rotors ensures linear, uniform volumetric movement, eradicating fluid turbulence and system hammering.
2. Self-Lubricated Internal Bearing Track: Relies directly on the running medium for bearing cooling and lubrication, dropping the maintenance overhead associated with external lube systems.
3. Hydraulic Axial Balancing System: Designed to balance out axial forces internally via fluid pressure, preventing premature mechanical wear on the thrust faces during sustained high-pressure operation.
4. Built-in Safety Relief Overpass: Features a built-in safety relief valve with an adjustable mechanical spring assembly, protecting the pump body and pipeline from over-pressurization during blockages.
5. Strict Centering Tolerances: Machine-faced shaft ends allow for strict coupling alignment (radial/axial alignment error tolerances under 0.1 mm), minimizing mechanical vibration and maximizing the lifespan of the coupling rings.

Compatible Equipment & Prime Movers

• Electric Motors: Directly compatible with standard IEC and JIS frame size 3-phase AC induction motors (variable speed or fixed speed, 50/60 Hz).
• Coupling Type: Flexible shaft couplings with standard rubber insert rings.
• Marine Powerplants: Drop-in compatibility with auxiliary engine room modules found on commercial vessels, container ships, bulkers, and oil tankers built across major East Asian shipyards.

Applications

• Main & Auxiliary Engine Lubrication: Continuous-duty main engine crosshead or journal lubrication pump circuits.
• Marine Fuel Oil Transfer: Bulk movement of Marine Gas Oil (MGO), Low-Sulfur Heavy Fuel Oil (LS-HFO), and residual heavy oil blends between settling and service tanks.
• Boiler Fuel Supply Feed: High-pressure constant feed to industrial and marine oil-fired steam boilers.
• Industrial Bulk Fluid Transfer: Refinery and chemical facility processing lines handling self-lubricating, non-corrosive petroleum compounds and process oils.

Marine Engineer Expert’s Guide:

When integrating an unused surplus or “New Old Stock” pump like this Taiko Kikai MSHS-20 from a vessel asset, you cannot simply bolt it down and hit start. Storage over long periods can cause residual preservative oils to harden, or internal seals to dry out.

Tips for Flawless Installation:

• The Pre-Rotation Check: Before coupling the pump to the motor, manually rotate the power rotor shaft by hand using a strap wrench or soft coupling turn. It must rotate freely without catching or showing hard resistance points.
• Priming is Mandatory: Screw pumps are positive displacement but cannot run dry. The internal bearings and mechanical seals depend entirely on the pumped fluid for lubrication. Always flood the suction casing completely with clean oil before initial start-up.
• Laser Alignment Focus: Taiko Kikai mandates an alignment tolerance under 0.1 mm for both the face and radial gap at the coupling side. Always execute hot alignment checks once the engine room or plant reaches stable operational temperatures, as thermal expansion can alter shaft centering.

Frequenty Asked Questions

What is the maximum handling temperature for the Taiko Kikai MSHS-20?

The MSHS-20 horizontal three-rotor screw pump is officially rated to handle high-temperature viscous fluids up to a maximum limit of 150°C (302°F), making it highly suitable for heated heavy fuel oil (HFO) lines.

Can this pump handle non-lubricating fluids like fresh water or chemicals?

No. The internal ball bearings and the meshing profile of the idler rotors rely directly on the pumped fluid for operational lubrication. Pumping non-lubricating media like water will result in immediate friction scoring and catastrophic mechanical failure.

What are the precise coupling alignment tolerances for the MSHS series?

Taiko Kikai specifications dictate that the allowable alignment error value at the shaft coupling side surface (radial alignment) and the shaft coupling end face (axial gap) must be kept strictly under 0.1 mm at operational shaft speeds.

Does the pump include an internal protection mechanism against overpressure?

Yes, the pump is built with an integrated, mechanical spring-loaded safety relief valve assembly. If line pressures cross the set threshold up to the maximum 0.60 MPa limit, the valve opens to bypass fluid internally back to the suction loop.