Product

Ball Valve Automatic Assembly Machine

Ball valve automatic assembly machine is dedicated equipment for automated ball valve assembly. It integrates valve body feeding, ball and seat seal fitting, stem assembly, press-fitting and tightening, opening/closing torque testing and air-tightness testing, delivering fast cycle time, high precision and a stable pass rate for one-piece, two-piece and three-piece ball valves.

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Automatic Ball Valve Assembly Machine

kouteng@lonturn.com

Hotline:15828477070

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Product Overview

The ball valve automatic assembly machine is dedicated equipment for the automated assembly of ball valve products. Built around a servo motor and cam indexer as its motion core, it uses a multi-station rotary table or linear transfer mechanism to complete, in sequence, valve body feeding, ball and seat seal fitting, automatic alignment and assembly of the stem to the ball, bonnet assembly, press-fitting, torque tightening, ball valve opening/closing torque testing, air-tightness testing and finished-product discharge, achieving continuous automatic assembly of ball valves from loose parts to finished products.

Compared with manual assembly, the ball valve automatic assembly machine offers a stable cycle time, controllable ball turning torque and bonnet tightening torque, and consistent quality between batches. It effectively eliminates missing seals, reversed balls, damaged stems and insufficient tightening, and its assembly pass rate is maintained above 99.5%. It can run as a stand-alone unit or be linked with feeders such as the electric vibratory bowl feeder and the motor-driven belt elevator to form a ball valve automatic assembly line. It is widely used for batch ball valve assembly in plumbing and sanitary ware, gas pipelines, HVAC and industrial pipeline industries.

⚙️ 1. Drive and Motion System Specifications

Parameter	Typical Range / Description
Drive system	Servo motor + precision ball screw / cam indexer; multi-station rotary table or linear transfer
Rated voltage	Standard 220V, customizable to 110V / 380V
Controlled axes	4–14 axes, configured by assembly process and linkage requirements
Stations	Standard 8–24 stations, expandable or reducible by ball valve process
Positioning accuracy	Repeat positioning accuracy ±0.01 mm; overall positioning accuracy ±0.02 mm
Drive protection	Fully enclosed sheet-metal guarding + safety light curtain, suitable for continuous operation

🔩 2. Ball Valve Assembly Process and Precision

Parameter	Typical Range / Description
Assembly operations	Valve body feeding, seat seal fitting, ball assembly, stem-to-ball alignment assembly, O-ring fitting, bonnet assembly, press-fitting, torque tightening, opening/closing torque testing, air-tightness testing, finished-product discharge
Ball assembly accuracy	Ball-to-seat coaxiality ≤0.03 mm; ball orientation detected automatically to prevent reversed installation
Stem alignment	Automatic alignment for flat, keyway or cross-slot types; press-in depth monitored to avoid stem damage
Tightening torque	Bonnet / nut tightening 2–80 N·m, torque accuracy ±3%, monitored and logged in real time
Opening/closing torque test	In-line testing of ball valve operating torque 0.2–10 N·m; out-of-tolerance parts rejected automatically
Air-tightness testing	Dual-station testing of both body seal and stem seal; test pressure 0.1–1.6 MPa, leak resolution 0.1 mL/min
Vision inspection	Optional CCD vision system for ball orientation, missing seals, stem position and appearance checks
Assembly pass rate	≥ 99.5% (with conforming incoming parts)

🏋️ 3. Workpiece Range and Capacity

Parameter	Typical Range / Description
Ball valve types	One-piece, two-piece and three-piece ball valves; female thread, male thread, welded and flanged connections
Size range	Nominal bore DN8–DN100 (1/4″–4″); body envelope Φ20–Φ160 mm
Body materials	Brass, stainless steel, carbon steel, PVC / PPR plastics
Seal materials	PTFE, reinforced nylon, EPDM / NBR / FKM rubber seals
Cycle time	2–8 s per piece, depending on the number of operations and the feeding method
Capacity	Approx. 450–1800 pcs/h, configurable by cycle time and shift pattern
Feeding method	Vibratory bowl feeding (balls / stems / nuts), belt elevator feeding (valve bodies) or automatic bin replenishment; can be linked in line
Machine weight	Approx. 500–2500 kg, depending on the number of stations and configuration

🔌 4. Electrical and Control Specifications

Parameter	Typical Range / Description
Control system	PLC + servo drives, touch-screen HMI, parameters stored and recalled as recipes
Control interface	Supports PLC / PC / MES interfaces; can be linked with feeding, inspection and packaging equipment
Monitoring and protection	Torque monitoring, pressure monitoring, material shortage alarm, out-of-tolerance torque rejection, safety light curtain with emergency stop
Working air pressure	0.5–0.7 MPa (pneumatic actuators); clean, dry air supply required
Data traceability	Optional assembly data recording and traceability, with barcode / QR code binding to each product
Working temperature	Standard 0–40°C, humidity ≤85% RH (non-condensing)

📋 5. Quick Selection Guide by Ball Valve Size

Ball valve size	Recommended stations	Reference cycle time	Reference capacity
Small (DN8–DN15)	8–12 stations	2–3 s	1200–1800 pcs/h
Medium (DN20–DN40)	12–18 stations	3–5 s	720–1200 pcs/h
Large (DN50–DN100)	18–24 stations	5–8 s	450–720 pcs/h

Note: The cycle times and capacities above are reference values for standard configurations. Actual figures depend on the ball valve structure, sealing type, number of operations and inspection requirements; customized solutions are available on request.

Customization and Service

Beyond standard models, we provide customized solutions based on ball valve structure, assembly process and capacity requirements, including mixed-model production of one-piece, two-piece and three-piece ball valves, quick changeover between sizes, vision inspection, operating torque testing, air-tightness testing, servo press-fitting and data traceability, together with matched feeding equipment such as vibratory bowl feeders and belt elevators. We offer one-stop service from solution design and equipment manufacturing to installation and commissioning. Send us your ball valve samples and assembly requirements and our engineers will recommend a suitable model and quote.

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