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.

Regulates and Balances Silo Pressure
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
- 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.
- 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