Overview
The LMI 33050 anti-siphon pressure relief valve assembly is a precision-engineered component designed to prevent siphoning and protect pump systems from overpressure conditions. This 0.375″ assembly combines dual functionality—anti-siphon protection and pressure relief—in a single compact unit, making it essential for chemical metering pump installations and industrial fluid dosing systems.
Key Features
- Anti-Siphon Protection: Prevents discharge line siphoning that could drain fluid from the supply tank.
- Diaphragm Design: Spring-loaded diaphragm mechanism provides reliable and repeatable pressure regulation.
- Field-Adjustable Pressure: Pressure setting easily adjusted in the field without special tools.
- Compact 0.375″ Size: Space-efficient form factor compatible with standard pump discharge configurations.
- CNC Precision Machining: Tight tolerances ensure consistent performance across multiple installations.
- Material Variety: Available in multiple material options for chemical compatibility across diverse applications.
Technical Specifications
The LMI 33050 delivers the following technical performance characteristics:
- Adjustable relief pressure range: 8–150 psi (optional up to 350 psi)
- Factory-set nominal pressure: 50–65 psi
- Design type: Right-angle, 3-port diaphragm valve
- Sealing element: PTFE diaphragm with spring load
- Port size: 0.375″ (inlet/outlet/relief)
- Mounting: Standard pump discharge configuration
- Optional features: Air release port, pressure gauge port
Typical Applications
The LMI 33050 anti-siphon pressure relief valve serves in:
- Chemical metering pump systems (sodium hypochlorite, hydrogen peroxide, acid/base solutions)
- Water treatment and disinfection stations
- Industrial fluid injection and dosing systems
- Plumbing and HVAC systems requiring anti-siphon valves
- Pool and spa chemistry feed systems
- Any application requiring combined siphon prevention and overpressure protection
Compatibility & Replacements
Compatible With
- LMI Series PD and EXCEL AD chemical metering pumps
- LMI AutoPrime and standard pump discharge configurations
- Standard 0.375″ threaded pump discharge ports
- Chemical dosing systems using positive displacement metering pumps
- Systems requiring 50–150 psi relief pressure settings
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The LMI 33050 is designed as a direct replacement for original LMI anti-siphon/pressure relief valve assemblies on compatible pump models.
Works With
- Multifunction valve kits for LMI pump upgrades
- Standard hydraulic and pneumatic metering system networks
- Field-adjustable relief valve assemblies and retrofit kits
- Chemical feed systems using diaphragm-pump technology
