Product Overview

Model Specifications & Nomenclature

Model Nomenclature (Per OST 23.1.92-88)

• NSH: Basic code for gear pump.
• 50: Displacement per revolution, 50 cm³/rev.
• M/A: Design version (M for standard type, A for “Antey” upgraded type).
• 3/4: Nominal pressure rating (3 for 16 MPa/160 bar, 4 for 20 MPa/200 bar).
• Additional Symbols: L (left rotation, counterclockwise from the drive end; right rotation is not marked); Climatic version (U/T/HL per GOST 15150-69 for export, omitted for domestic use).

Main Executions

1. NSH50M Series: Designed for hydraulic systems with maximum continuous pressure of 160 bar. The pump body is made of special aluminum alloy, offering a lightweight and cost-effective solution. Maximum intermittent pressure reaches 210 bar, and peak pressure is 250 bar, with a maximum speed of 3000 min⁻¹.
2. NSH50A Series (“Antey” Series): Available in two pressure grades – 160 bar and 200 bar. For the 200 bar version, the housing is made of high-strength cast iron, enhancing reliability and durability. It can withstand maximum intermittent pressure of 250 bar and peak pressure of 280 bar, with a maximum speed of 3000 min⁻¹ (2400 min⁻¹ for 200 bar grade).

Technical Parameters

Parameter	NSH50M	NSH50A (160 bar)	NSH50A (200 bar)
Displacement	50 cm³/rev	50 cm³/rev	50 cm³/rev
Maximum Continuous Pressure (p₁)	160 bar	160 bar	200 bar
Maximum Intermittent Pressure (p₂)	210 bar	210 bar	250 bar
Maximum Peak Pressure (p₃)	250 bar	250 bar	280 bar
Maximum Speed (nₘₐₓ)	3000 min⁻¹	3000 min⁻¹	2400 min⁻¹
Minimum Speed (nₘᵢₙ)	500 min⁻¹	500 min⁻¹	500 min⁻¹
Housing Material	Special Aluminum Alloy	Aluminum Alloy/Cast Iron	High-Strength Cast Iron

NSH50 Series Gear Pump

Structural Features & Advantages

• Efficient & Stable Performance: Adopts advanced design, precision-machined components, and high-precision manufacturing equipment, ensuring consistent efficiency throughout the service life. The integrated gear and housing design minimizes hydraulic load on components.
• Low Maintenance Requirement: Simplified structure with mechanical seals made of multi-layer materials, eliminating the need for barrier fluid supply. Sleeve bearings are mounted in a robust assembly unit to improve operating conditions and durability.
• Compact & Versatile Installation: Small volume allows installation in confined spaces. Available in both left and right rotation directions, compatible with splined shaft connections for power transmission.
• High Reliability: The “MЧ” and 200 bar A-series adopt cast iron housings to resist high pressure and shock, suitable for harsh working environments. Complies with GSTU and GOST standards, ensuring interchangeability with original parts.

Application Scope

• Agricultural machinery: MTZ tractors and other farm equipment.
• Construction & engineering machinery: Excavators, loaders, road construction machinery, and municipal engineering equipment.
• Mining machinery: Hydraulic systems for mining equipment and bulk material handling machinery.
• Other fields: Industrial hydraulic systems, special-purpose vehicles, and mechanical equipment requiring stable oil delivery under pressure.

Quality & Warranty