INDUSTRY COMPONENT

Adjusting Screw

A precision screw used to adjust pressure settings in pressure reducing valves for industrial applications.

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Component Specifications

Definition
The adjusting screw is a threaded mechanical component in pressure reducing valves that controls the position of the spring-loaded diaphragm or piston, thereby regulating the outlet pressure by varying the spring compression force. It enables fine-tuning of pressure settings through rotational movement, typically requiring specific torque values for proper calibration.
Working Principle
The adjusting screw works by compressing or decompressing a spring through rotational movement. As the screw is turned clockwise, it increases spring compression, which raises the force against the diaphragm or piston, resulting in higher outlet pressure. Counterclockwise rotation reduces spring compression, lowering the outlet pressure. This mechanical adjustment allows precise control of pressure reduction ratios.
Materials
Typically made from corrosion-resistant materials: stainless steel (AISI 304/316), brass (C36000/C37700), or alloy steel with protective coatings. High-temperature applications may use Inconel or titanium alloys.
Technical Parameters
  • Length 20-60 mm
  • Head Type Hex socket, slotted, or knurled
  • Thread Type Metric (M6-M12) or UNC/UNF
  • Thread Pitch 1.0-1.75 mm
  • Torque Range 2-15 Nm
  • Pressure Range 0-25 bar
  • Temperature Range -20°C to 200°C
Standards
ISO 4762, DIN 912, ASME B18.3

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Adjusting Screw.

pressure valve adjusting screw valve calibration screw pressure regulator adjustment industrial valve components precision adjustment hardware Adjusting Screw Adjusting Screw in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Pressure Reducing Valve

A valve that automatically reduces a higher inlet pressure to a steady lower outlet pressure regardless of flow variations.

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Safety Relief Valve

A pressure relief device designed to automatically open and discharge fluid when pressure exceeds a predetermined set point to prevent equipment failure.

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Engineering Analysis

Risks & Mitigation
  • Over-tightening causing spring damage
  • Thread corrosion leading to seizure
  • Improper calibration resulting in pressure instability
  • Material incompatibility with process media
FMEA Triads
Trigger: Corrosion from chemical exposure
Failure: Thread seizure preventing adjustment
Mitigation: Use corrosion-resistant materials and protective coatings
Trigger: Excessive torque during adjustment
Failure: Stripped threads or spring deformation
Mitigation: Implement torque-limiting tools and operator training
Trigger: Vibration in operation
Failure: Screw loosening and pressure drift
Mitigation: Apply thread-locking compounds and regular inspection

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.05 mm thread diameter, ±0.1 mm length
Test Method
Torque-to-turn testing, pressure calibration verification, material certification per ASTM/EN standards

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

How often should adjusting screws be recalibrated?

Recalibration frequency depends on operating conditions: typically every 6-12 months for continuous operation, or whenever pressure fluctuations exceed ±5% of setpoint.

Can adjusting screws be replaced with different thread types?

No, adjusting screws must match the valve's thread specifications exactly. Using incompatible threads can cause cross-threading, leaks, or calibration errors.

What maintenance is required for adjusting screws?

Regular inspection for thread wear, lubrication with compatible anti-seize compounds, and verification of torque settings during preventive maintenance cycles.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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