Product Description
The types of plunger couples produced by Huahui Oil Pump and Nozzle Company include: BQ series, No. I series, No. II series, A series, AK series, AD series, P series, and high-pressure common rail series, with diameters ranging from 5 to 18 mm. With inclined grooves and spiral grooves with different leads and different rotational directions, the product can meet the needs of oil pumps for diesel engines with different performances.
The plunger couple of the fuel injection pump is made of precise matching of the plunger and the plunger sleeve. It is made of special alloy material and after fine processing, the fitting clearance is maintained at 0.0015 - 0.0025mm. During work, the plunger reciprocates in the sleeve to accurately control fuel pressure and flow and provide support for efficient operation of the engine.
Overview
The BQ Series Plunger Assembly is a high-performance diesel fuel injection component specifically engineered for use in various inline fuel injection pumps. Designed to withstand the demands of modern diesel engines, the BQ Series ensures precise fuel metering and high-pressure injection to optimize combustion efficiency. Manufactured with advanced heat treatment and precision grinding processes, the BQ Series delivers long-lasting durability and consistent performance, even in harsh working conditions.
Whether used in agriculture, construction, transportation, or stationary power systems, the BQ Series is a trusted choice for reliable engine performance and fuel economy.
Key Features & Advantages
Precision Fuel Control
Provides accurate fuel delivery with minimal deviation, helping improve engine responsiveness and combustion stability.
Durable Alloy Steel Construction
Built with wear-resistant, high-strength materials for extended operational life under high-pressure cycles.
Enhanced Engine Efficiency
Supports cleaner combustion, reducing fuel waste and lowering emissions.
Versatile Compatibility
Designed to fit a wide range of fuel pumps and engine models, especially those used in off-road and commercial diesel engines.
Low Maintenance Requirements
The BQ Series maintains performance over time with minimal service, reducing overall maintenance costs.
Applications
The BQ Series Plunger Assembly is suitable for:
Agricultural Machinery
Tractors, tillers, sprayers, and harvesting equipment
Construction Equipment
Earthmovers, loaders, compactors, and generators
Commercial Vehicles
Light and heavy-duty diesel trucks and buses
Stationary Diesel Engines
Industrial generators, water pumps, and marine engines
Its rugged design and fuel delivery accuracy make it a preferred solution for demanding engine environments.
FAQ
How many production lines in your factory?
5 production lines
How long is your delivery time?
One week for spot goods, 60 days for orders
Can you design the equipment according to our size?
Yes
What makes the BQ Series plunger different from other series?
The BQ Series is optimized for durability and fuel injection consistency, even under extreme conditions, making it ideal for heavy-duty and continuous-use engines.
What signs indicate the plunger needs replacement?
Watch for poor engine starting, uneven idling, black smoke, reduced power, or increased fuel consumption—these may point to a worn or clogged plunger.
Can I install the BQ Series plunger without professional help?
While mechanically inclined users may attempt installation, proper alignment and calibration are critical. Professional installation is recommended to ensure engine safety and optimal performance.
How long does the BQ Series plunger last under normal usage?
When paired with good fuel quality and regular maintenance, the BQ Series typically lasts between 2,000 and 3,500 engine hours.
Does the plunger require any special maintenance?
Routine use of clean diesel and regular fuel filter replacement are key. The plunger itself is low-maintenance but should be checked periodically for wear during engine service intervals.
Company Introduction
Changzhou Huahui Fuel Injection Equipment Co.,Ltd's main products include S and P series long and short injector assembly and injector nozzle parts. Injection pumps used in 165-1125 single-cylinder engines and plungers and oil delivery valve parts used in injection pumps. In recent years, with the efforts of our scientific research personnel, we have successively developed P series BQ type, PW type, P7 type, P8 type, PE type, PN type, P7100 type, P2000 type, high-pressure common rail series, etc., a total of more than 100 types of plunger parts and electronically controlled single pumps.
