Tank Dip Hatches, Level Gauging and Sampling,

Gauge Hatches

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

Pressure Vacuum Relief Valve Sizing program

Sizing Programme for Breather Valves available on request

Types of Gauge Hatch we Supply

Hinged Cover (Model 6000): Affords access for gauging or collecting product samples from storage tanks. The Model 6000 series is thoughtfully designed with a non-slip foot lever surface to ensure safety while opening. As a practical feature, the cover will close automatically due to gravity when pressure on the foot treadle is removed.
Locked Down Hinged Cover (Model 6100): Crafted for use on tanks filled with non-volatile liquids and at the tips of vent pipes. These Free Vents ensure efficient flow capacity to optimally protect your tank. Each of our Free Vents comes with a wire mesh screen that serves as a barrier to prevent foreign objects from entering the tank or pipe opening. The weather hoods of these vents are easily removable, facilitating effortless inspection of the vent and the wire mesh screen.
Gauge Hatch (Model 61T): Delivers convenient access for gauging or sampling from storage tanks, with a unique gauge hook and “cushioned-air” seating design for superior sealing and emission control, all backed by our comprehensive sales and customer support.

Nestled in the South West, UK. Our headquarters is home to a passionate and enthusiastic team, that wants to support the industry for a cleaner and safer future.

Get in Touch

We invite you to book a complimentary 1-hour online session with our experts. This online consultation will provide you and your team an opportunity to delve into critical areas such as Tank Venting, Valve Testing, and an in-depth understanding of API 2000 and ISO 28300 standards. Our specialists are ready to introduce you to the most advanced techniques and best practices available in the industry. Please don’t hesitate to reach out to us, contact us today to schedule your session.

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

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.

Visit our Maintenance & Inspection page below to explore our innovative solutions for your equipment. Or get in Contact with the team to discuss your organisation's needs.