Our Gauge Hatches are engineered to offer secure access for dipping or sampling from storage tanks as needed. We present two specific models to suit a wide range of operational demands, and additional customisations can be catered to on request.

Our first model is an open-hinged variant that doesn’t hold any vapour pressure. It is most effective when paired with Free Vents, creating an efficient and convenient solution for routine tank inspections and sample collection.

The second model we offer incorporates a lockdown feature, making it compatible for use with pressurised tanks. This sturdy model can withstand pressure up to 3 psig. It utilises air cushion seat design ensuring top-tier sealing and durable performance.

Additional models available include the Free Vent, Goose Neck and Weather Hood Free Vent

Sizing Programme for Breather Valves available on request

Documentation List

Individual documentation can be requested from the following list as applicable

• Certificate of Conformity
• Certified capacity flow curves
• ATEX Certification
• Material test Certificate
• Manufacturing Record Book
• Certificate of Origin
• Positive Material Procedures and Test Reports
• GA Drawings
• Hydrostatic and Pneumatic Test
• Pressure Test Reports and Certification
• Surface Preparation and Coating Reports
• Installation, Operation and Maintenance Manual
• Shipping and Maintenance, Preservation Procedures
• Inspection and Test Plan

Certification and Compliance

Assentech provides comprehensive certification and compliance documents for all our products. These include:

• Valve Calibration / SetPoint Certification
• Individual Vent Leakage Certificates in accordance with ISO28300 or API2000 on both vacuum and pressure ports.

This rigorous certification ensures maximum sealing and no emission loss, leading to increased confidence from regulators, the public, and environmental bodies.

Evidence Duty of Care

Assentech is dedicated to providing high-quality after-sales support to our customers. We stand out as the only authorised repair and service centre equipped with the necessary technology, certification, and knowledge to detect leakage, test performance, and maintain your Breather Valves to keep you safe and compliant. With full access to factory spares, all our processes are fully traceable, guaranteeing the best in customer care.

Responsible Procurement

Assentech believes in being fully transparent and accountable in our procurement processes. We provide a full and comprehensive range of industry-specific compliance sheets, certificates, and reports available upon request. This ensures our customers in the tank storage industry and beyond have full insight into the documentation that supports their choice of products and services.