Silo overfill protection valves
When abnormal pressure threatens your silo’s integrity, reliable pressure relief becomes critical. Designed for instant reaction, these spring-loaded valves ensure controlled venting, safeguarding your operations seamlessly.

The Spring-Loaded Pressure Relief Valves VCP from WAMGROUP are engineered to provide critical safety regulation and pressure balancing in silos. They feature a unique design with a cylindrical casing and disc-shaped inner lid controlled by spring rods, ensuring efficient venting and protection against overpressure or vacuum conditions. Ideal for diverse applications like ready-mix concrete and food processing, these valves operate continuously, manually balancing pressure to protect structural integrity. With a flow rate of up to 13,000 m³/h, they are available in painted carbon steel or 304 stainless steel. Notably, they comply with European Regulation (EC) No. 1935/2004 for food industry applications, offer ATEX-certified options, and integrate mechanical setups for inductive sensor signaling. Easy fitment and quick maintenance make them a reliable choice for industries ranging from construction to chemicals, with customization available for specific operational needs.
Benefits
- Protects silo integrity by preventing structural damage from pressure imbalances.
- Reduces installation time with its lightweight, easy-to-fit design.
- Minimizes maintenance downtime through straightforward access for quick servicing.
- Enhances compliance in food applications with options meeting European standards.
- Supports safer operations with optional ATEX certification for explosive environments.
- Applications
- Sugar processing,Asphalt mixing,Ready-mix concrete production,Rubber processing,Drymix building materials,Animal feed milling,Beverage processing,Plastics processing,Chocolate processing,Spices,Paint and varnish processing,Cement and minerals processing,Cocoa,Coffee processing,Convenience food,Detergent processing,Precast concrete production,Bakeries,Brewery,Fertilizer processing
- End products
- Bread,Plastic granules,Mineral aggregates,Npk fertilizers,Animal feed pellets,Acrylic paints,Rubber tires,Beer,Cement blocks,Spice blends,Cocoa powder,Coffee beans,Varnishes,Juices,Granulated sugar,Laundry detergents,Instant noodles,Precast concrete panels,Chocolate bars,Asphalt mixtures,Ready-mix concrete,Drymix mortar
- Steps before
- Bin,Silo Manufacturing,Lime Dosing,Mechanical,Pneumatic Conveying,Concrete Production,Animal Feed Milling,Paint and Varnish Processing,Plastics Processing,Flour Milling,DryMix Processing,Pasta Processing,Biscuit Processing
- Steps after
- Silo Safety System,Silo Venting,Dust Filtration,Pressure Monitoring,Level Monitoring,Silo Integrity Check,Inductive Signalling
- Input ingredients
- air,suction pressure,normal air pressure
- Output ingredients
- excess pressure,relieved air
- Flow rate
- up to 13,000 m³/h (7,650 cfm)
- Material
- Painted carbon steel or 304 stainless steel
- Maximum Negative Pressure
- -0.005 bar (-0.07 psi)
- Maximum Excess Pressure
- 0.05 bar (0.72 psi)
- Design
- Lightweight and compact
- Automation level
- Manual / PLC / SCADA
- Batch vs. continuous operation
- Batch / Inline Continuous
- CIP/SIP
- CIP 121°C / SIP 135°C
- Cleaning method
- CIP / Manual
- Energy efficiency
- 0.5–2 kWh/kg moisture
- Abrasion resistance
- Suitable for abrasive materials
- Biological compatibility
- Compliant with food industry standards
- Cleanability
- Easy to clean design
- Corrosive resistance (e.g. acids)
- Stainless steel construction for corrosion resistance
- Density/particle size
- Designed for various bulk materials
- Compact footprint
- Lightweight design and reduced overall dimensions
- Discharge method
- Connected with a spigot welded on the silo roof
- Material
- Painted carbon steel or 304 stainless steel casing
- Weather Protection
- Stainless steel weather protection cover
- Valve Mechanism
- Helical springs with disc shape inner steel lid
- Material Type
- Painted carbon steel or 304 stainless steel
- Size Options
- Two sizes available
- Sensor Option
- Inductive sensors
- Settings Adjustment
- Optionally different settings available
- Certification Options
- ATEX-certified version
- Industry Compliance
- Compliance with European Regulation (EC) No. 1935/2004
- Weather Protection
- Stainless steel weather protection cover
- Market info
- WAMGROUP is known for its expertise in manufacturing bulk material handling and processing equipment, including screw conveyors, dust collectors, and valve systems, with a strong reputation for innovation, quality, and global market presence.