KSVB Vacuum Relief Valve
KSVB Vacuum Relief Valve Overview
ZIRCO is proud to distribute KSPC KSVB Vacuum Relief Valves as the official representative for Western Canada. Designed and tested according to API 2000 code, these spring-loaded valves provide specialized protection against vacuum overpressure conditions that can cause storage tank collapse during product withdrawal or thermal contraction.
The KSVB is specifically engineered as a vacuum relief valve only, protecting tanks from the dangerous vacuum conditions that occur when product is pumped out faster than air can enter, or when temperature drops cause vapor contraction. The spring-loaded mechanism allows precise adjustment of the vacuum set point from -25mmW.C to -9,000mmW.C, ensuring reliable operation across diverse industrial applications.
Built with high-strength one-body casting for structural integrity and durability, the KSVB is available in Carbon Steel, 304SS, and 316SS construction to suit various product applications. Sizes range from 50mm to 350mm with ANSI 150lb flanges as standard. This valve is ideal for applications where pressure relief is handled separately through normal venting devices, providing dedicated vacuum protection for your storage assets throughout Western Canada's demanding industrial environments.
Why Choose KSVB Vacuum Relief Valves?
API 2000 Compliant
Designed and tested according to API 2000 code, ensuring compliance with industry standards for vacuum relief valve performance and storage tank safety.
Vacuum Relief Only
Spring loaded valve specifically designed for vacuum protection, preventing tank collapse when product withdrawal creates vacuum conditions exceeding safe limits.
Wide Pressure Range
Adjustable vacuum settings from -25mmW.C to -9,000mmW.C for diverse industrial applications requiring precise vacuum set points.
Multiple Materials
Available in Carbon Steel, 304SS, and 316SS with various trim options to suit individual application requirements and product compatibility.
Spring Loaded Design
Spring loaded mechanism provides precise and adjustable vacuum pressure settings, allowing customization for specific tank requirements.
Durable Construction
High-strength one-body casting provides added structural integrity and durability for demanding industrial applications throughout Western Canada's harsh climate conditions.
Technical Specifications
KSVB Vacuum Relief Valve Specifications
| Specification | Details |
|---|---|
| Model | KSVB (KSPC Vacuum Breaker/Breather Valve) |
| Type | Spring Loaded Vacuum Relief Valve (Vacuum Only) |
| Vacuum Set Pressure Range | -25mmW.C to -9,000mmW.C (adjustable) |
| Design Standard | API 2000 code |
| Available Sizes | 50mm through 350mm |
| Flange Standard | ANSI 150lb (standard) |
| Body Materials | Carbon Steel, 304SS, 316SS |
| Trim Options | Various trims available to suit requirements |
| Construction | High-strength one-body casting |
Operating Conditions
| Parameter | Description |
|---|---|
| Function | Vacuum relief only (protects against vacuum conditions) |
| Operation | Opens when tank vacuum exceeds set point, admits air to prevent tank collapse, reseals when normal pressure is restored |
| Typical Applications | Storage tanks with separate pressure relief devices, high-withdrawal-rate applications, thermal contraction scenarios |
| Environment | Suitable for outdoor installations in Western Canada climate conditions |
Design & Operation Features
| Feature | Description |
|---|---|
| Spring Loaded Mechanism | Provides precise and adjustable vacuum set pressure for accurate operation |
| Tight Seal | Maintains seal until vacuum exceeds set point, then opens to admit air |
| Automatic Reseating | Automatically closes when normal pressure is restored, maintaining tank integrity |
| Prevents Air Intake | Prevents air ingress during normal operation, protecting product quality |
| Evaporative Loss Prevention | Helps minimize evaporative losses of stored product when operating within normal parameters |
Typical Applications
- Storage tanks where pressure relief is handled separately through normal venting devices
- Tanks with high product withdrawal rates creating significant vacuum conditions
- Applications requiring dedicated vacuum protection only
- Storage facilities with separate normal venting systems
- Oil & gas storage tanks throughout Western Canada
- Petrochemical and chemical storage facilities
- Refinery tank farms and storage terminals
- Applications where thermal contraction can create dangerous vacuum conditions
Installation Requirements
The KSVB vacuum relief valve must be installed in accordance with API 2000 requirements and local applicable codes. Key installation considerations:
- Mount on tank roof at appropriate location for vacuum relief
- Ensure adequate structural support for the valve weight
- Verify flange compatibility (ANSI 150lb) with tank nozzle
- Select appropriate body material for compatibility with stored product and environmental conditions
- Coordinate with existing pressure relief vents to ensure complete tank protection
- Regular inspection and maintenance recommended for continued reliable operation
What Is a Vacuum Relief Valve?
A vacuum relief valve (also known as a vacuum breaker) is a safety device designed to protect storage tanks from collapsing due to excessive vacuum conditions. These conditions typically occur when product is pumped out of a tank faster than air can enter to replace the volume, or when temperature drops cause vapor contraction within the tank. Without adequate vacuum relief, the atmospheric pressure difference can cause catastrophic tank collapse.
The KSVB vacuum relief valve monitors tank pressure and opens at a predetermined vacuum set point (adjustable from -25mmW.C to -9,000mmW.C) to admit air into the tank, equalizing pressure and preventing structural damage. Once normal pressure is restored, the valve automatically closes, maintaining tank integrity and protecting product quality from air ingress.
Vacuum Only vs. Pressure-Vacuum Relief: The KSVB is designed as a vacuum relief valve only, providing dedicated vacuum protection for applications where pressure relief is handled separately through normal venting devices or pressure relief valves. For applications requiring both pressure and vacuum protection in a single valve, consider KSPC's pressure-vacuum relief valves (KSBH/KSHS for vent to atmosphere, or KSBG/KSGS for pipe away applications).
ZIRCO provides expert application support for Western Canada industries, helping you select the right vacuum relief solution for your specific storage tank requirements, ensuring API 2000 compliance and safe, reliable operation.
Vacuum Relief vs. Pressure-Vacuum Relief Valves
| Valve Type | Protection | Best For | KSPC Models |
|---|---|---|---|
| Vacuum Relief Only | Vacuum protection only | Applications with separate pressure relief vents | KSVB |
| Pressure-Vacuum Relief (Vent to Atmosphere) | Dual protection (pressure & vacuum) | Direct venting to atmosphere, non-odorous products | KSBH/KSHS |
| Pressure-Vacuum Relief (Pipe Away) | Dual protection (pressure & vacuum) | Pipe away applications for vapor recovery/treatment | KSBG/KSGS |
Contact ZIRCO for assistance determining which valve type best suits your application.
Product Literature & Resources
Technical Documents
KSVB Product Catalog
Complete specifications, dimensions, performance data, and application information for KSVB Vacuum Relief Valves
Contact for More Information
ZIRCO is the authorized Western Canada representative for KSPC KSVB Vacuum Relief Valves. Contact our team for:
- Technical specifications and sizing assistance
- API 2000 compliance consultation
- Vacuum relief valve selection guidance
- Application engineering support
- Material selection for product compatibility
- Vacuum relief vs. pressure-vacuum relief comparison
- Quotations and delivery information
- After-sales service and support
Ready to Protect Your Storage Tanks From Vacuum Collapse?
Contact our team today to discuss how KSPC KSVB Vacuum Relief Valves can provide API 2000 compliant vacuum protection for your storage tanks. ZIRCO provides expert support for Western Canada's oil & gas, petrochemical, and industrial storage facilities.