B400 Emergency Relief Manway
B400 Emergency Relief Manway Overview
The B400 Series ensures that tanks and vessels are kept safe during periods of excessive pressure due to external fire sources and also allows access to the tank for inspection and cleaning purposes. As the official 3B Controls representative for Western Canada, ZIRCO provides these essential safety devices to oil and gas operations throughout Alberta and beyond.
This weight-loaded pressure relief model is designed specifically for emergency pressure relief scenarios. The B400 features a lightweight design with interchangeable components for easy maintenance, ensuring your storage tanks meet safety standards while minimizing operational downtime.
Key Benefits for Western Canada Operations:
- Hinged cover ensures automatic re-seat after activation
- Self-draining design prevents condensate accumulation
- Low leakage - less than 1 scfh at 90% of set pressure
- Wide size range from 8" to 36"
- Factory tested and fully certified
- Available in aluminium, carbon steel, or stainless steel
Note: 3B Controls also supplies a PV Emergency Relief Manway with combined pressure and vacuum relief. Contact ZIRCO for more information on the B400 PV model.
Technical Specifications
Weight Loaded Pressure Settings
| Specification | Value |
|---|---|
| Pressure Settings | +4 mbarg to 140 mbarg (standard) |
| Size Range | 8″ (200 mm) – 36″ (900 mm) |
| Design Type | Weight-loaded pressure relief |
Construction Materials
| Component | Standard Options |
|---|---|
| Body Materials | Aluminium, Carbon Steel, Stainless Steel |
| Trim Material | Stainless Steel |
| Diaphragm Material | PTFE |
| Flanges | Drilled only - API / ANSI / DIN / JIS / Specials available |
Options & Accessories
| Option | Description |
|---|---|
| Hinged Cover | Ensures automatic re-seat after activation |
| Steam Jackets | For freeze protection and temperature maintenance |
| Proximity Switches | Indicate pallet lift for monitoring systems |
| Alternative Materials | Available for hazardous and corrosive applications |
Non-Standard Applications
For specialized applications beyond standard specifications, 3B Controls offers numerous custom options through consultation with their engineering team. These include:
- Exotic Materials: Hastelloy and various plastics suitable for hazardous environments
- Special Coatings: Applied for extreme service conditions
- Low Temperature Applications: Internal parts can be PTFE coated to prevent seizure in cold environments
* All products are subject to continuous development and 3B Controls reserves the right to change specifications without notification.
Product Features & Benefits
Low Cost Maintenance
Lightweight design provides easy handling whilst interchangeable components ensure standard parts are easily replaced. Minimizes downtime and maintenance costs for Western Canada operations.
Testing & Quality Assurance
All products are factory tested and fully certified to meet stringent industry standards. Ensures reliable performance when safety matters most for your tank storage operations.
Self Draining Design
All products are designed so that any condensate drains away from seating areas, preventing freeze damage and ensuring reliable operation in all weather conditions common in Western Canada.
Low Leakage Rate
Standard seating design ensures minimum leakage of less than 1 scfh at 90% of set pressure. Protects product quality and reduces emissions for environmental compliance.
Premium Internal Parts
Internal parts are stainless steel as standard. Non-standard materials available upon request for corrosive or hazardous applications common in oil and gas operations.
Flexible Connections
All valves are supplied with drilled flanges to meet individual requirements. API, ANSI, DIN, JIS, and special configurations available for global compatibility and site-specific needs.
Product Literature & Resources
Technical Documents
B400 Emergency Relief Manway
Complete technical specifications and product information
Request for Quote
Request for Quote (RFQ) Form
Download and complete this form to submit your emergency relief valve requirements for quotation
Contact for More Information
ZIRCO is the authorized Western Canada representative for 3B Controls tank venting and safety products. Contact our team for:
- Technical specifications and sizing assistance
- Application engineering support
- Quotations and delivery information
- After-sales service and spare parts
- Information on the B400 PV model with vacuum relief
Ensure Your Tank Safety with 3B Controls
Contact our team today to discuss how B400 Emergency Relief Manways can protect your storage tanks and vessels. ZIRCO provides expert support and authorized 3B Controls products for Western Canada oil and gas operations.