INDUSTRY COMPONENT

Oil Drain/Fill Valve

Specialized valve for controlled oil drainage and filling in tap changer tanks

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Component Specifications

Definition
A precision-engineered valve component designed specifically for transformer tap changer tanks to facilitate safe, controlled, and efficient drainage of insulating oil during maintenance and refilling with new or filtered oil. It ensures proper sealing, prevents contamination, and maintains oil quality in electrical insulation systems.
Working Principle
Operates through a manual or automated mechanism that opens/closes a flow path between the tank interior and external oil handling systems. When opened, it allows oil to drain via gravity or pumping; when closed, it provides a hermetic seal to maintain tank integrity and prevent leaks.
Materials
Body: ASTM A216 WCB carbon steel or 316 stainless steel; Seals: Nitrile rubber (NBR) or fluorocarbon (FKM); Internal components: Brass or stainless steel; Coating: Epoxy paint for corrosion resistance
Technical Parameters
  • Actuation Manual handwheel or quarter-turn lever
  • Port Size 1/2" to 2"
  • Leakage Class ANSI/FCI 70-2 Class VI
  • Connection Type Flanged (ANSI 150#) or threaded (NPT)
  • Pressure Rating 10 bar maximum
  • Temperature Range -20°C to +100°C
Standards
ISO 5208, DIN 3202, IEC 60296

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Oil Drain/Fill Valve.

oil drain valve oil fill valve tap changer valve transformer maintenance valve insulating oil valve electrical equipment valve Oil Drain/Fill Valve Oil Drain/Fill Valve in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Tap Changer Tank

The sealed enclosure containing the insulating oil and housing the tap changer mechanism.

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Engineering Analysis

Risks & Mitigation
  • Oil leakage leading to environmental contamination
  • Improper sealing causing moisture ingress
  • Valve failure during emergency drainage
  • Material incompatibility with oil additives
FMEA Triads
Trigger: Seal degradation due to aging or chemical incompatibility
Failure: Oil leakage from valve
Mitigation: Regular seal inspection/replacement per maintenance schedule; use compatible seal materials
Trigger: Corrosion of valve body in harsh environments
Failure: Valve seizure or structural weakness
Mitigation: Apply protective coatings; use corrosion-resistant materials like stainless steel
Trigger: Improper installation or overtightening
Failure: Thread damage or seal distortion
Mitigation: Follow manufacturer torque specifications; use proper installation tools

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Leakage < 0.1 mL/min per inch of port diameter at rated pressure
Test Method
Hydrostatic pressure test per ISO 5208; seal integrity test per IEC 60529 IP68

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

What is the primary function of an oil drain/fill valve in tap changer tanks?

To enable safe and controlled removal of insulating oil during maintenance and precise refilling without introducing air or contaminants.

How often should oil drain/fill valves be inspected?

During routine transformer maintenance (typically every 3-5 years) or whenever oil sampling/testing indicates potential issues.

Can these valves be used with different types of insulating oils?

Yes, but material compatibility must be verified—especially seal materials—with specific oil types (mineral, silicone, or ester-based).

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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