Which Type Of Shot Blasting Machine Should Be Used For The Pipe Fittings Of Valves

Which type of shot blasting machine should be used for the pipe fittings of valves?
For the shot blasting cleaning and strengthening of hardware valves (such as cast iron, cast steel, stainless steel, copper alloy, etc.), the mainstream options are the types of "track-type", "hook-type", "turntable-type", and "chain suspension-type". Additionally, the type suitable for assembly lines is "chain suspension-type". Now, based on the sequence "small / medium batch small parts → medium / large parts / precision parts → assembly line production", I will give you the most practical selection suggestions.
1. Small and medium-sized valves (large batch, afraid of磕碰)： The first choice is the "track-type shot blasting machine"
Representative models: Q324, Q326, Q3210 (most commonly used)
DN15 to DN100 small-diameter ball valves, stop valves, gate valves, plumbing valves, copper valves, stainless steel small parts
Batch production, intermittent production in medium and small quantities
De-sanding of castings, removal of oxide scale, rust removal, strengthening, pre-coating treatment
Core advantages (most suitable for valves)
Automatic rolling, no dead corners： The track drives the workpiece to continuously rotate, the inner and outer surfaces, flanges, flow channels can all be blasted
High efficiency, low cost： One-time loading of several hundred kilograms, cycle of 5 to 12 minutes, single machine daily processing capacity can reach several tons
Compact structure, small floor space, suitable for hardware workshops
High automation level： Can be equipped with automatic loading / unloading, saves labor force Attention
Not suitable for ultra-thin-walled, easily deformed, high-precision sealing surface valves (which may cause slight collisions)
Stainless steel valves must be treated with stainless steel shot and choose models with wear-resistant rubber / polyurethane inner linings to prevent iron contamination
II. Medium and large diameter / complex / precision valves: The preferred option is the hook-type shot blasting machine
Representative models: Q376, Q378, Q379 (single / double hooks)
DN100 and above: Gate valves, butterfly valves, globe valves, check valves, power station valves, special valves
Structurally complex, with deep cavities / flanges / sealing grooves, prone to collisions, and requiring high standards for castings
Medium-sized and large-sized valves with a single weight of 50kg to 3 tons Core advantage
Swing rotation, 360° without blind spots: Shot blasting can reach the inner cavity, flange surface, sealing groove, and valve body dead corners.
No collision, no scratches: Suitable for precision cast steel / stainless steel valves and finished valve reinforcement.
Multi-purpose in one machine: Can handle both large and small valves, pump bodies, and pipe fittings in the same line.
Adjustable strength: Suitable for thick oxide-coated cast steel parts, and also gentle treatment for stainless steel parts. Attention
The efficiency is lower than that of the crawler type, suitable for multiple varieties and medium-small batch production.
Requires manual / vehicle loading of materials.
III. High precision / Flat / Plate-type valves: Rotary table type shot blasting machine
Representative models: ZP800, ZP1200
Rotary table type shot blasting machine Applicable scenarios
Butterfly valves, flanges, thin-walled valves, wafer valves, disc components
Precision valves with uniform surfaces, no deformation or dents, and free from scratches
Small batch, multiple varieties, flat / asymmetrical workpieces Core advantage
The workpiece is fixed on the rotating table and the rotating head performs multi-angle fixed-point cleaning.
There is no collision or deformation, and it is particularly suitable for thin-walled, large flat surfaces, and sealing surfaces.
The cleaning is uniform and the roughness is consistent, which is conducive to subsequent spraying / electroplating.
IV. Batch production on assembly line: Chain suspension type shot blasting machine
Representative model: Storage / Step chain suspension type Applicable scenarios
Single variety, large batch, continuous production (such as dedicated production line for valve factories)
Hanging-mounted medium and small-sized valves
Automation of connection with casting, heat treatment, and painting processes Core advantage
Continuous / stepwise conveying, loading and unloading materials and shot blasting are carried out simultaneously, achieving the highest efficiency.
The workpieces are suspended and rotate freely, without collision or dead corners.
Suitable for large-scale, low-labor modern workshops.
V. Key Reminders for Selection (Must-read for the Valve Industry)
Material matching
Cast iron / cast steel: Use steel shot (G40 to G50)
Stainless steel / copper / aluminum alloy: Do not use steel shot → Must use stainless steel shot / ceramic sand, and the equipment lining must be anti-iron contamination
Shot blasting machine power
Small parts: Single blasting head 11 to 15 kW
Medium and large parts: Double blasting heads 15 to 22 kW (more suitable for thick oxide scale)
Must be equipped with
Pulse dust removal system (environmental protection + keep the workshop clean)
Shot material screening / purification system (ensure cleaning quality)
VII. One-sentence Recommendation
Small valves, large volume, seek low cost → Track-type shot blasting machine Q326
Medium and large valves, complex, afraid of collision → Hook-type shot blasting machine Q378
Butterfly valves, thin parts, high precision → Turning table-type shot blasting machine
Assembly line, fully automatic → Chain-type shot blasting machine