Adjusting Screw: Torque Range 2-15 Nm, Pressure Range 0-25 bar

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

Parameter	Typical range	Notes & selection driver
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

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

Standards

ISO 4762, DIN 912, ASME B18.3

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.

View Product Details

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.

View Product Details

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

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Adjusting Screw

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

HANZHOU CANDID I/E CO.,LTD

Hangzhou, Zhejiang, CN

Also makes: Heat Treatment Furnace, Belt Conveyor, Ceramic Tile Press and 6 more

Listed on the company's own website · profile compiled by CNFX from public sources

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Adjusting Screw