The Duravant family of operating companies serve the food processing, packaging and material handling segments.

Opti 340 Vacuum Stuffer & Pump

  • Key Specs
  • Features
  • Accessories
  • Technical Info
  • Piston Diameter:
    8-9/16" (217 mm)
  • Piston Stroke:
    14" (355 mm)
  • Maximum Capacity:
    34,000 lbs/hr (15227 kg/hr)
  • Maximum Volume (based on water):
    66 gpm (250 lpm)
  • Product Outlet:
    4" (102 mm)
  • Max. Product Pressure:
    250 psi (17 bar)
  • Machine Weight:
    3,565 lbs (1617 kg)
Marlen vacuum stuffing and pumping systems are able to handle whole muscle, sectioned, formed, and emulsified. Marlen equipment includes twin-piston vacuum stuffers and pumps, hoppers, extruders, transducer portioning systems, depositors, vacuum fillers, grinders, forming systems, volumetric portioners, open hoppers, vacuumizing combo hoppers, load assist hoppers, auger hoppers, and Marlen parts.

  • Able to pump large particulates at rates up to 34,000 lbs per hour with a maximum of 250 psi vacuumize pumping pressure
  • Marlen’s proven twin-piston pumping system design; largest product opening on the market
  • Twin position and sleeve design allows for the industry’s highest vacuumizing pumping available eliminating the need for inferior dual stage vacuumization process
  • Designed with two modes of pumping for better pressure control or controlled flow rate which allows the plant to tailor the equipment to the application
  • OPTI vacuum fillers and stuffing pumps can achieve the highest vacuumization in the industry for excellent color retention results
  • Marlen’s patented design eliminates metal-to-metal contact within the pump chamber which eliminates regular costly part replacement and downtime
  • Twin-Piston Pumping Chamber features an 10° incline that increases product flow into the pumping chamber. Easier loading into the pumping chamber ensures maximum operating efficiencies.
  • State-of-the-art control panel with built-in self-diagnostic feature helps reduce downtime
  • Unobstructed patented 4 inch hydraulically driven front valve for positive shifting and even product flow
  • OPTI vacuum fillers and stuffing pump design reduces loose parts and simplifies cleaning
  • Hopper options include standard open top hopper to full vacuumizer hoppers with augers for load assist for complete versatility
  • High differential vacuum stuffers on vacuumized units ensures maximum removal of entrapped air for better weight control, shelf life, and casing savings
  • Patented externally adjustable diffuser valve with 8 inch inlet enables the Opti-Series to maximize the product’s exposure to vacuum
  • Power-Tilt Hopper is hydraulically operated from the touch pad control panel for full access into all product areas during cleanup
  • Designed for easy operation and control with diagnostic capabilities
  • State-of-the-art control panel
  • Large recipe storage capacity. Easy screen navigation. 8.4″ touch screen.
  • Foreign language customizing
  • Externally-adjustable diffuser valve (Patented)
  • Push-button controls
  • Proven twin-piston design
  • Largest product openings
  • Zero-slip design eliminates product degradation
  • Minimal product damage and fewer cuts
  • Designed to reduce the need for downstream accumulators or bypass
  • Precise metered flow or constant pressure control
  • Built to USDA accepted standards
  • Smaller number of parts simplifies cleanup
  • Marlen International also offers Marlen parts for the OPTI 340 Vacuum Filler and Stuffing Pump
  • Made in the USA

Your Expert Partner

Doug Vogelsmeier Product Sales Manager - Pumping & Portioning Send Email →

Product Description

Features a twin-piston vacuum stuffing and pumping system with a variety of hopper options designed to match product requirements. Maximum capacity 34,000 lbs per hour, 250 psi pumping pressure. Ideal for higher volume applications. Can be equipped with an optional hydraulic fluid cooling unit without the need for water cooling.


  • OPTI Vacuum Stuffing & Pumping Systems Brochure Download →
  • Technical Review: Implications of Insufficient Air Removal in Meat and Poultry Products Download →
  • Advantages of Marlen Opti PipeChek X-Ray Meat Inspection System Download →