VARIVENT® 24/7 PMO
The 24/7 PMO Valve® 2.0 is standardized and tailored for use in PMO-regulated systems. 24/7 PMO Valve® is a registered trademark of GEA. It refers to double-seat valves that have been approved for use in PMO-regulated systems, where one seat is lifted to clean the leakage chamber while the other pipeline continues to transport the product. This allows the plant operator to clean all product-contacting parts of the valve while production continues. In this way, the valves enable continuous production around the clock, 24/7.
Dairies covered by the PMO use this valve in all non-aseptic process areas, such as milk reception, storage, and distribution of raw milk; the pasteurization unit’s inlet and outlet; and filling lines. This solution prevents the product line from mixing with a line containing cleaning solution.
The VARIVENT® 24/7 PMO Valve® 2.0 is used almost exclusively in dairy applications subject to the provisions of the Pasteurized Milk Ordinance (PMO). This primarily applies to dairies in the United States. The valves are used for mix-proof isolation of incompatible products at pipe junctions.
When the valve is closed (unoperated position), there are always two seals between the separate pipelines. If one seal is defective, the resulting leak will be directed through the leak outlet to the outside, without mixing with the product in the other pipe.
| Sizes |
| Double-seat valves |
| OD 1 ½” - OD 6″ |
| Application | Sealing | Feature | Type |
| Axial Sealing (Switching Leakages) | Modular System | Double-seat Valve, Type D_L, D_C |
|
| Axial Sealing (Switching Leakages) | With Water Hammer Safety | Double-seat Valve with Balancer, Type B_L, B_C |
|
| Radial Sealing | With Water Hammer Safety | Radial Sealing Double-seat Valve, Type R_L, R_C |
|
| Axial Sealing (Switching Leakages) | Viscous Products or Products with large Particles | Double-seat Long-stroke Valve, Type D_L/V, D_C/V |
|
| Product Range, piggable | Radial Sealing | Pigging Pipe Top of the page |
Piggable Double-seat Valve Upside Down, Type L_HL, L_HC |
| Product Range, piggable | Radial Sealing | Pigging Pipe Bottom | Piggable Double-seat Valve Upright, Type L_SL, L_SC |
| According to PMO Regulations | Radial Sealing | With Allowance for Seat Lifting | 24/7 PMO Valve 2.0, Type M/2.0 |
Actuators for lifting
The valves are always equipped with a lifting actuator that allows for the individual lifting of a single valve disc during cleaning of the relevant pipeline. VARIVENT® 24 / 7 PMO Valve® 2.0 meets the strict requirements of the PMO (Pasteurized Milk Ordinance) and is certified according to 3-A Standard 85-02 to perform the seat lift function while milk or dairy products are being transported in the other pipeline.
In this case, the cleaning medium passes through the seal on the raised valve disc, cleans the leakage chamber, and is then discharged through the leakage outlet. This ensures that all surfaces in contact with the product are cleaned, including the sealing surfaces of the valve disc seals.
According to Item 12p of the PMO ”Cleaning and Sanitizing of Containers and Equipment,” all surfaces that come into contact with the product must be cleaned at least once a day. For this reason, the VARIVENT® 24/7 PMO Valve® 2.0 comes standard with a cleaning device for the balancer.
When the lower valve plate is lifted, a gap automatically opens between the seal on the lower balancer and the valve plate. The cleaning medium can then enter the balancer’s cleaning device and clean the balancer’s surface. In this way, the valve meets the requirements of section 12p of the PMO without the need for any additional measures.
However, upon request, the valves can also be supplied without a cleaning device for the balancer if the surface is cleaned by other means, such as by operating the valve through its full stroke during cleaning.
24 / 7 PMO Valve® 2.0. Please refer to the catalog for more information.
Technical Data of the Standard Version
| 24 / 7 PMO Valve® 2.0 | |
| Material in contact with the product | 1.4404 / AISI 316 L |
| Material not in contact with the product | 1.4301 / AISI 304 |
| Seal material in contact with the product | EPDM, FKM, HNBR |
| Ambient temperature | 0 to 45 °C |
| Air supply pressure | 6 bar (87 psi) |
| Product pressure | 10 bar (101 psi) |
| Surface in contact with the product | Ra ≤ 0.8 μm |
| External housing surface | Matte blasted |
| Control and feedback system | Selectable; the feedback of all valve positions is required acc. to PMO |
| Actuator type | Pneumatic actuator air / spring |
| Connection fittings | Welding end |
| Identification | Adhesive ID tag |
| Valve seat version | Welded seat ring |
| Certificates | EHEDG, A3, CE |
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