Stroke Length Adjustment Mechanism for Chemical Dosing Pumps

Product Specifications

Technical details and manufacturing context for Stroke Length Adjustment Mechanism

Definition

The stroke length adjustment mechanism is a critical subassembly in chemical dosing pumps that precisely regulates the amount of chemical fluid delivered per pumping cycle. It functions by mechanically or electronically altering the distance the piston or diaphragm travels during its forward stroke, thereby controlling the displacement volume. This adjustment capability allows operators to fine-tune dosing rates without changing pump speed, making it essential for applications requiring precise chemical metering in industrial processes. The mechanism typically employs a threaded adjustment screw, cam system, or electronic actuator that changes the effective stroke length of the pump's driving linkage. By rotating the adjustment knob or activating the actuator, the mechanism alters the pivot point or limiting position of the drive mechanism, which in turn changes how far the piston or diaphragm can travel during each pumping cycle. This mechanical adjustment directly correlates to the volume of fluid displaced per stroke. The mechanism is available in configurations using stainless steel, aluminum alloy, or engineering plastics, with key parameters including an adjustment range of 0–100% of maximum stroke length, a stroke length of 5–50 mm, and an adjustment resolution of ±0.5%. Operating pressure is specified as 1.0–1.6 MPa, and operating temperature ranges from -20 to 80°C. Adjustment torque is 5–15 N·m, and weight varies from 2.5 to 4.0 kg depending on configuration. Ingress protection is rated IP54–IP65 (per IEC 60529), and repeatability is ±1.0%. Material grade 316L stainless steel is referenced per ASTM A240. These values are directory references and must be verified with the legal manufacturer or supplier for the specific model and application.

Working Principle

The mechanism adjusts the stroke length by changing the effective travel of the piston or diaphragm. This is achieved via a threaded screw, cam, or electronic actuator that moves the pivot point or limiting stop of the drive linkage. Rotating the adjustment knob or activating the actuator alters the mechanical limit, thereby changing the distance traveled per cycle. This directly controls the displaced volume per stroke, enabling precise dosing without changing pump speed.

Common Materials

Stainless Steel, Aluminum Alloy, Engineering Plastics

Technical Parameters

Parameter	Typical range	Notes & selection driver
Adjustment Range	0–100 %	Percentage of maximum stroke length
Stroke Length	5–50 mm	Maximum adjustable travel distance
Adjustment Resolution	±0.5 %	Precision of stroke length setting
Operating Temperature	-20–80 °C	Seals degrade above 80°C
Adjustment Torque	5–15 N·m	Required torque for manual adjustment
Material	316L	Corrosion-resistant stainless steelASTM A240
Weight	2.5–4.0 kg	Depends on configuration
Ingress Protection	IP54–IP65	Protection against dust and water jetsIEC 60529
Repeatability	±1.0 %	Consistency of stroke setting

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Adjustment Screw Part
Provides fine mechanical adjustment of stroke length through threaded rotation

Material: Stainless Steel
Locking Nut Part
Secures the adjustment screw position to prevent unintended changes during operation

Material: Stainless Steel
Stroke Limiter
Mechanical stop that defines the maximum and minimum stroke positions

Material: Hardened Steel
Indicator Scale Part
Visual reference for current stroke length setting

Material: Anodized Aluminum
Cam Optional
Sets the stroke by profile instead of by screw thread, on cam-type mechanisms.
Electronic Actuator Optional
Sets the stroke from a control signal, so dosing can be changed remotely.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Chemical Dosing Pumps

View system integration details

Manufacturers of Stroke Length Adjustment Mechanism

Manufacturer profiles associated with Stroke Length Adjustment Mechanism.

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Frequently Asked Questions

What is the function of a stroke length adjustment mechanism?

It controls the volume of fluid delivered per stroke by adjusting the travel distance of the piston or diaphragm, allowing precise dosing without changing pump speed.

What are the typical adjustment ranges?

The adjustment range is 0-100% of maximum stroke length, with a stroke length of 5-50 mm and resolution of ±0.5%. These are reference values; confirm for your model.

What materials are commonly used?

Common materials include stainless steel (e.g., 316L per ASTM A240), aluminum alloy, and engineering plastics. Material selection depends on chemical compatibility and application.

What operating conditions are specified?

Operating pressure is 1.0-1.6 MPa, temperature -20 to 80°C, and ingress protection IP54-IP65 (IEC 60529). Always verify with the manufacturer for your specific conditions.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0 to 20 bar
flow rate:	0.1 to 100 L/h
temperature:	-20°C to 120°C
slurry concentration:	Up to 30% solids by weight

Stroke Length Adjustment Mechanism

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