Ball Valve Assembly Machine

Ball valve assembly machine for feeding, seal and ball assembly, stem alignment, press-fitting, torque and air-tightness testing, with fast changeover.

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kouteng@lonturn.com

Hotline:15828477070

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Product Overview

The Ball Valve Assembly Machine is an automated assembly system for ball valve production. Built on a multi-station rotary table or linear transfer platform and combined with servo pressing, torque tightening and in-line inspection units, it completes valve body feeding, seat and seal ring assembly, ball assembly, stem alignment and assembly, bonnet assembly, press-fitting and torque tightening, switching torque testing, air-tightness testing and finished-part unloading in sequence — turning loose components into finished ball valves.

The machine is designed around mixed-size production with fast changeover: by changing the tooling and calling up a stored recipe, valve sizes from DN8 to DN100 can be switched on the same machine. It can run as a stand-alone assembly station or serve as a flexible assembly cell inside an existing line, linked with vibratory bowl feeders, belt elevators and downstream inspection or packaging equipment to form a complete ball valve assembly line. A stable cycle time, controlled press depth and tightening torque and consistent batch quality effectively eliminate missing seal rings, reversed balls, damaged stems and insufficient tightening.

🔧 1. Assembly Process and Station Configuration

Process	Station configuration and action
Feeding	Valve bodies oriented and fed by vibratory bowl feeder or belt elevator; stems, balls and nuts fed by bowl feeders, with material shortage alarm
Seal ring assembly	Automatic pick-and-place and pre-pressing of seat seals and O-rings; missing or wrong parts detected by CCD vision and rejected
Ball assembly	Automatic ball orientation recognition, then press-fitted into the valve body, ensuring ball-to-seat coaxiality ≤0.03 mm
Stem assembly	Automatic alignment of flats / keyways / cross slots; press-in depth monitored on line to avoid stem damage
Bonnet press & tightening	Servo press-fitting with torque tightening; tightening torque 2–80 N·m settable, torque accuracy ±3%
Inspection & unloading	Switching torque test (0.2–10 N·m) and air-tightness test (0.1–1.6 MPa); out-of-tolerance parts automatically rejected, good parts unloaded

📐 2. Key Performance Parameters

Parameter	Typical range / description
Positioning accuracy	Station repeat positioning accuracy ±0.01 mm, overall positioning accuracy ±0.02 mm
Assembly accuracy	Ball-to-seat coaxiality ≤0.03 mm; stem press-in depth monitored on line
Tightening torque	Bonnet / nut tightening 2–80 N·m, torque accuracy ±3%, monitored and logged in real time
Switching torque test	Ball valve opening / closing torque 0.2–10 N·m tested in line, out-of-tolerance parts rejected
Air-tightness test	Dual-station test of body seal and stem seal, pressure 0.1–1.6 MPa, leak resolution 0.1 mL/min
Cycle time & capacity	Cycle time 2–8 s per piece, capacity approx. 450–1800 pcs/h

🔩 3. Applicable Ball Valve Specifications

Parameter	Typical range / description
Valve types	1-piece / 2-piece / 3-piece ball valves; threaded, welded and flanged connections
Size range	DN8–DN100 (1/4″–4″), body outline Φ20–Φ160 mm
Body material	Brass, stainless steel, carbon steel, PVC / PPR
Sealing material	PTFE, reinforced nylon, EPDM / NBR / FKM rubber seals
Changeover	Quick-change tooling + recipe recall, ≤30 min between sizes of the same series

🔌 4. Control, Inspection and Data Traceability

Parameter	Typical range / description
Control system	PLC + servo drives + HMI touch screen, recipe-based parameter storage and recall
Interfaces	PLC / PC / MES interfaces; can be linked with feeding, inspection and packaging equipment
Inspection & protection	Torque monitoring, press force monitoring, material shortage alarm, torque out-of-tolerance rejection, safety light curtain and E-stop
Data traceability	Optional assembly data logging with barcode / QR binding for unit-level traceability

📋 5. Quick Selection Guide

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

Note: the cycle time and capacity above are reference values for standard configurations; actual values depend on valve structure, sealing type, number of stations and inspection requirements. Customized solutions are available.

Customization and Service

Beyond standard models, we provide customized solutions based on valve structure, assembly process and capacity requirements: mixed-model assembly of 1-piece / 2-piece / 3-piece ball valves, fast changeover between sizes, servo press-fitting, torque tightening and monitoring, switching torque testing, air-tightness testing, CCD vision inspection, data traceability and MES integration. The machine can also be combined with electric vibratory bowl feeders and motor-driven belt elevators to form a complete ball valve assembly line. Send us your valve sample, assembly process requirements and target capacity, and our engineers will propose the suitable configuration and quotation.

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