NSH180G / NSH250 Large-Displacement Hydraulic Gear Pumps

NSH180G and NSH250 large-displacement gear pump enquiries

Olive Branch Hydraulics is a Chinese manufacturer supporting large-displacement NSH gear pump enquiries for mobile hydraulic equipment. This series page brings together NSH180G and NSH250 model references while keeping the exact pump configurations separate. Complete markings, rotation and installation measurements are required to select a build.

The photograph is a supplier-labelled reference from the combined NSH180G/250 catalogue family. It is not an independently identified photograph of every listed model. The NSH250A-4 dimensional image is a catalogue reference for identification only, not an approved manufacturing drawing or a promise that every supplied variant has identical dimensions.

Model names and Russian references

Latin G corresponds to Cyrillic Г, A to А and L to Л in these enquiry forms. Spacing and transliteration can vary, but construction and rotation suffixes must remain on the order specification. A shortened NSH250 description does not establish the shaft, flange, rotation or operating limits.

Confirm the complete installation

Full nameplate and casting markings, including every suffix.

Rotation viewed from the drive-shaft end.

Shaft spline profile, diameter, projection and coupling details.

Mounting pilot, flange dimensions and bolt-hole pattern.

Suction and pressure connection dimensions, location and pipe clearance.

Overall envelope, drive speed, pressure duty and hydraulic oil conditions.

Large-displacement pump selection must consider both circuit flow and available drive torque. Delivered flow changes with speed and internal leakage; displacement is not a fixed litres-per-minute output. Continuous, intermittent and peak pressure are different duty conditions. Confirm the operating limits against the data sheet for the exact quoted pump rather than applying one generic NSH rating to every model.

Keep construction variants separate

The 180G, 250 and 250A references are selection categories, not an unconditional interchangeability list. Compare the original pump and proposed drawing before approving installation. Smaller NSH32, NSH50 and NSH100 units, as well as tandem assemblies, have their own specifications. Do not choose a pump merely because its housing colour or flange outline looks familiar.

Equipment names and parts-book numbers are useful enquiry information. They do not establish fit without the pump code and interface dimensions. Machine-specific OEM numbers should be supplied with their source so the proposed configuration can be checked.

Order and documentation review

Submit the pump marking, photographs, original drawing and machine information.

Confirm model, rotation, mounting, drive and oil connections.

Approve the proposed configuration drawing and requested inspection documentation.

Confirm quantity, sample requirements, packaging and quotation terms.

Frequently asked questions

Are NSH180G and NSH250 the same pump?

No. They are separate model references and must be checked individually against the original installation.

Does the gallery show every model separately?

No. It contains one combined-family reference photograph and an NSH250A-4 catalogue drawing.

What does the L or Л suffix identify?

It denotes a left-hand version in the reference NSH marking system. Confirm actual rotation viewed from the shaft end.

Can NSH250 and NSH250A be ordered under one short code?

Keep the complete construction suffix. Any substitution requires a technical comparison and approval.

Are catalogue dimensions the final supplied dimensions?

No. The final approved drawing for the quoted configuration determines installation dimensions.

How are price and delivery confirmed?

They are confirmed in the quotation after model, configuration, quantity and documentation requirements are agreed.

Request a configuration quotation

Send Olive Branch Hydraulics the full pump code, rotation, interface measurements, duty requirements and quantity for a configuration-based quotation.