During the construction phase of anaerobic digestion plants, but also during operation and retrofitting, safe access to the inside of the tank via a manhole must be ensured. The entry and exit of people, material and equipment through the side walls is necessary. The side chute ensures quick opening and closing of the chute lid by means of a spindle lock and additional sealing on the inside by liquid pressure. The inside is curved to ensure that no mud particles or other solids stick to it.

Manhole opening laterally inward

The side shafts are supplied with diameters between 600 mm – 1200 mm. The width of the frame is ordered individually.

Manhole opening laterally inward
Manholes are supplied with diameters between 600 mm – 1200 mm. Source: rsb.info

Our side shafts are made of stainless steel 1.4571 and are suitable for hydrostatic pressure up to 4 bar.

Features

  • Easy opening and closing due to screw spindle closure
  • Pressure range up to approx. 4 bar
  • Temperature range up to 100° C
  • Perfect sealing
  • The lid is hinged, it does not need to be removed
  • Completely in stainless steel 1.4571
  • Made in Austria

Application and specifications

  • Side entry and exit into storage tanks, pits, towers, other concrete structures
  • For material entries or plunger inserts we recommend diameters > 800 mm
  • Completely in stainless steel 1.4571
  • Screw spindle closure – easy to use
  • Hydrostatic pressures up to 4 bar

Manhole opening laterally outward

The side chute ensures easy and quick opening and closing of the chute lid by means of a handle. Its curved inner surface prevents slurry particles or other solids from settling on it. The side shafts are available with clear diameters from 606 mm -1274 mm. The frame length is individually adjustable.

Manhole opening laterally outward
The manholes are available with clear diameters from 606 mm -1274 mm. Source: rbs.info

Our side shafts are made entirely of stainless steel 1.4571 and are suitable for hydrostatic pressures up to approx. 4 bar.

Features

  • Easy to open/close
  • Pressure range up to approx. 4 bar
  • Operating range up to 100°C
  • Completely made of stainless steel 1.4571
  • Made in Austria

Application and specifications

  • Lateral entry/exit into storage tanks, pits, towers and concrete structures
  • For material supply or the use of divers we recommend diameters >800 mm
  • Made entirely of stainless steel 1.4571
  • Hydrostatic pressure up to approx. 4 bar

Manhole roof

A sufficiently large and easy to open/close opening is required for performing repair and inspection work and for transporting bulky equipment into and out of aerobic digesters. The roof shaft is a robust and cost-effective shaft construction for this purpose. Our roof shaft is available in four different standard diameters – also in special sizes according to customer requirements. As a rule, stainless steel 1.4571 is used as the material for the roof shafts, and NBR round cord is used as the seal.

Manhole roof
The roof shaft is a robust and cost-effective shaft construction. Source: rsb.info

Features

  • Access openings in concrete tanks for inspections and maintenance work
  • Available in different diameters
  • Frame height according to customer requirements
  • Incl. Sealing sleeve for embedding in concrete slabs
  • Incl. Cover (without picture)
  • Made entirely of stainless steel 1.4571
  • Made in Austria

Application and specifications

  • Access and inspection opening for anaerobic digesters
  • Made entirely of stainless steel 1.4571
  • Cover gasket made of NBR

You can find an overview of our built-in parts for digesters in our brochure «Stainless steel built-in parts for digesters».