The D4PMO is specially engineered to meet Grade A Pasteurized Milk Ordinance (PMO) requirements, ensuring safe separation between product and CIP solutions during simultaneous processing. It includes PMO-compliant venting, leakage detection, and cleaning capabilities required for dairy applications that standard mix proof valves do not address.
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D4PMO Series: Mixproof Valves
The D4 Series Mix Proof valve offers reliable separation and continuous processing of dissimilar fluids in Grade A dairy, the D4PMO Series helps fulfill today’s customer demands. This next generation of mixproof valve technology is the result of continued development from both APV™ and Waukesha Cherry-Burrell™ process technologies.
Used for the reliable separation and continuous processing of dissimilar fluids in Grade A dairy, the D4PMO Series helps fulfill today’s customer demands for production flexibility, high productivity, rapid return on investment (ROI), and enhanced product quality across various applications in the fluid milk, cheese, cream, whey, and yogurt industries.
D4PMO Mixproof Valves
Key Features & Benefits:
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High value, Low life cycle costs:
- Newest generation continuous process PMO valve helps maximize plant uptime and allows flexibility in cleaning and dairy production schedules
- “All In” standard features provide exceptional value and help to increase ROI to align with customer budgets
- Reduced inventory costs with same seal kit used on multiple size ranges such as one kit for 1.5" - 3.0" sizes
- Minimal CIP losses improve cost savings
- Low air consumption and air supply requirements
- Long housing ports ease manifold building
- ntegrated shaft seal flush reduces need for external piping
- Mixed sizes and legacy centerline dimensions available to fit complex or existing installations with minimal piping rework
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Reliable performance:
- Innovative control unit design for fully integrated position and seat lift detection without external sensors
- Fully balanced design helps to prevent hydraulic blocking, withstand pressure spikes, and enables flexible flow direction without slamming
- Light overall weight helps support handling without lifting tools
- Slim stainless actuator is fully enclosed to prevent fluid ingress
- No compressed air needed for removal and servicing
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Cleanability:
- Designed to the latest 3-A Sanitary Standard 85-02 for PMO compliance
- Demonstrated ability to clean product-contact surfaces without full actuation of the valve
- Integrated flow channels clean product-contact portions of the upper balancer during seat lift movement so no cumbersome adapters or external piping are required
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Theory of Operation: Mixproof Valves
Double seat mix proof valves are used to efficiently process two different fluids (typically product and CIP) through the valve simultaneously. The D4PMO mix proof design has two seats which isolate the upper and lower pipe lines when the valve is in the fail-safe closed position. The innovative atmospheric vent cavity design in between the seats creates dual paths for any leakage should the seals fail as well as a drain for CIP solution during seat cleaning. Also, the upper seat clean movement allows integrated CIP flows to clean the portion of upper balancer exposed to product when open without the need for external flush piping.
D4PMO Mixproof Valve Overview
This video explains how the double-seat technology ensures safe product separation, reliable CIP performance, and efficient operation in sanitary processing systems.
Frequently Asked Questions
The D4PMO is widely used in the fluid milk, cheese, cream, yogurt, and whey industries, where processors require continuous production, strict hygiene, and compliance with Grade A dairy regulations. Its PMO-certified design provides reliable product separation for high-volume dairy operations.
Its modular, service-friendly design allows for fast maintenance, reduced downtime, and easier access to internal components. The valve’s advanced cleaning features enable processors to run CIP cycles without stopping production, improving overall system efficiency.efficiency.
Because it meets the PMO’s stringent sanitary standards, the D4PMO ensures regulatory compliance, superior cleanability, and verified leakage protection. This gives dairy processors confidence that product integrity is protected while maintaining high throughput and operational flexibility.
