130 Three-Claw Grate Plate

Qingyun Hongsheng Machinery Parts Co., Ltd. is one of the most reliable manufacturers and suppliers of 130 three-claw grate plate in China. We warmly welcome you to wholesale high quality 130 three-claw grate plate at low price from our factory. If you have any enquiry about quotation, please feel free to email us.

 

 

Product Overview & Model Explanation

The 130 three-claw grate plate, also known as 130 three-jaw grate, is named according to the industry's universal dimension standard. The "130" refers to the total length of the grate plate, which is 130mm. The "three-claw (three-jaw)" design means there are three supporting connecting claws at the bottom of the grate, which are used to pass through the pin shaft, connect the chain, and fix the grate plate firmly. It is a standard active grate plate for chain grate boilers, playing a key role in fuel transmission, combustion support, and ash discharge.

Standard Specifications & Dimensions

The 130 three-claw grate plate adopts industry-universal standard dimensions, ensuring perfect compatibility with most boilers and convenient replacement. The detailed parameters are as follows:

Model: 130 Three-Claw Grate Plate

Total Length (Main Body): 130mm

Width: 78~80mm

Height (Including Claws): 60mm

Pin Shaft Hole Diameter: Φ20mm (suitable for Φ18mm pin shaft)

Hole Center Distance: 80mm

Ventilation Grooves: Multiple longitudinal ventilation gaps for uniform air distribution and full combustion

Single Weight: Approximately 2.1~2.3kg

We also provide other common models in the same series, including 112mm, 115mm, 118mm, 120mm, 133mm, 135mm, 150mm, 155mm, and 165mm, to meet the needs of different boiler tonnages and specifications.

Structural Advantages & Working Principle

The 130 three-claw grate plate adopts a scientific two-part structure, combining practicality and durability to adapt to the harsh working environment of boiler furnaces:

Upper Panel: The main bearing part of the grate, which carries coal, biomass, and other fuels during combustion. The evenly distributed ventilation grooves not only facilitate air circulation and assist combustion but also effectively dissipate heat, prevent coking, and ensure stable operation of the boiler.

Bottom Three Claws: Composed of two side claws and one middle fixed claw, each with a pin shaft hole. The three-point force-bearing design ensures firm connection with the grate chain and pin shaft, making the entire grate belt run smoothly without jamming. Compared with single-claw grate plates, it has better stability; compared with four-claw ones, it is lighter, has better ventilation, and lower production costs.

As an active grate plate, it drives the entire grate belt to circulate, transport fuel, discharge ash, and complete the whole combustion process, which is the core transmission component of the chain grate boiler.

Material Options & Performance Advantages

According to different boiler working conditions and customer needs, we provide two types of high-quality materials, combining cost-effectiveness and high performance to meet diverse application scenarios:

1. Standard Material (Common in the Market)

High-silicon heat-resistant cast iron (malleable iron): It is the most commonly used material for 130 three-claw grate plates, with a temperature resistance of 600~700℃. It has the advantages of good wear resistance, strong thermal crack resistance, and low cost, which is suitable for civil and small industrial boilers with general working conditions.

2. Upgraded Heat-Resistant & Wear-Resistant Material (Our Advantage)

Based on our rich experience in heat-resistant and wear-resistant castings, we provide high-grade alloy cast steel options for high-temperature and heavy-load boiler working conditions, including ZG35Cr24Ni7SiN, ZG4Cr26Ni4, and ZG30Cr18Mn12Si2N. These materials have excellent high-temperature resistance (800~900℃), good creep resistance, and strong wear resistance, which can effectively avoid deformation, burnout, and cracking under long-term high-temperature operation. The service life is 2~3 times that of ordinary cast iron, making it suitable for boilers operating at full load for a long time.

Application Scope & Working Conditions

The 130 three-claw grate plate is widely used in small and medium-sized chain grate boilers, with strong adaptability to fuels and working conditions:

Applicable Boilers: 2~10t/h small and medium-sized chain coal-fired boilers, biomass boilers, atmospheric hot water boilers, and steam boilers.

Working Conditions: It is suitable for the working environment of grate transmission, fuel combustion support, bottom ventilation, and slag transportation and discharge. It can stably operate in high-temperature, dusty, and high-wear environments.

Core Advantages: Reasonable ventilation gaps ensure full fuel combustion; firm chain connection ensures stable operation; easy single-piece disassembly and replacement reduces maintenance costs; low failure rate and long service life.

Model Comparison & Selection Guide

To help you choose the most suitable grate plate, we compare the 130 three-claw grate with other common models in the same series:

Model	Total Length	Applicable Boiler Tonnage	Features
120 Three-Claw	120mm	2~4t Small Boilers	Compact, light-duty grate plate
130 Three-Claw	130mm	4~6t Medium Boilers	Most versatile, largest stock, widest usage
150 Three-Claw	150mm	6~10t Boilers	Extended and thickened, heavy-duty design

The 130 three-claw grate plate is the most versatile model, suitable for most 4~6t medium-sized boilers, and is the best-selling product in our factory with sufficient stock and fast delivery.

Production Process & Quality Assurance

We adhere to strict production standards and advanced casting technology to ensure the quality of each 130 three-claw grate plate:

Casting Process: Sand casting, with flat panel surface, precise claw size, and small pin shaft hole tolerance to ensure smooth chain connection without jamming.

Delivery State: As-cast state, with deburring, sand cleaning, and anti-rust treatment to improve product service life and appearance quality.

Supporting Parts: We provide a complete set of supply services, including Φ18 grate pin shafts, grate chains, and sprockets, to meet your one-stop purchasing needs.

Quality Inspection: Each batch of products undergoes strict quality inspection, including dimensional measurement, material composition analysis, and mechanical performance testing, to ensure that the products meet international standards and customer requirements.

Customization & Cooperation

As a professional manufacturer of heat-resistant and wear-resistant castings, we support customized production of 130 three-claw grate plates according to your drawings, boiler models, and working conditions. We can adjust dimensions, materials, and structural details to meet your specific needs. At the same time, we provide high-quality after-sales service and technical support, ensuring on-time delivery and stable product quality for both domestic and foreign customers.

Whether you need standard products or customized solutions, we are committed to providing you with high-performance, durable 130 three-claw grate plates, helping you improve boiler operation efficiency and reduce maintenance costs.

 

 

       

 

 

 

 

 

 

 

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