Alfa Laval Mainstream® Filters and Strainers

Mainstream basket-type filters and strainers provide versatile, cost-effective filtration. With a large surface area, Mainstream filters and strainers combine high flow rates, low pressure drop and simple clean-up and servicing. The end result is more efficient separation, faster throughput, and reduced media changeover.

For strainer applications, the unit can be fitted with a perforated stainless steel basket or wire mesh basket.

When used as a filter, the Mainstream unit incorporates a perforated stainless steel basket designed to hold woven and non-woven filter bags.

Mainstream products are available in long and short models.

Models

  • SEBR-1 Short Single Screen Strainer
  • SEBR-2 Long Single Screen Strainer
  • SESR-1 Short Strainer
  • SESR-2 Long Strainer
  • SEF-1 Short Filter
  • SEF-2 Long Filter
  • SEBHVWR-1 Short V-Wire Strainer
  • SEBHVWR-2 Short V-Wire Strainer
Application

Available in long and short models, Mainstream filters and strainers with side-entry ports provide versatile, cost-effective, basket-style filtration. Designed for maximum application flexibility, the Mainstream housing accepts a wide range of filtration and strainer media. For strainer applications, the unit can be fitted with a variety of different baskets. When used as a filter, the Mainstream unit incorporates a perforated stainless steel basket designed to hold disposable filter bags. Fine filtration can be achieved down to 0.5 micron. This model is ideal for use in the dairy, food, beverage, meat and poultry, cosmetics, and pharmaceutical industries.

Standard Design

Mainstream filters and strainers are designed to promote product quality and sanitation. It also features a free-flow design, stainless steel construction, compatibility with a variety of filtering media, and quick, easy servicing. The standard pressure relief cover for safe operation includes manual valve and drain elbow assembly. Two model sizes are available to accommodate a wide range of capacities. The inside-out flow prevents basket damage, while the unique handle with lock design for positive O-ring sealing prevents bypass and improves efficiency (US Patent No 4,775,469).

Working Principle

With a large surface area, Mainstream filters and strainers combine high flow rates, low pressure drop, and simple cleanup and servicing. High-capacity and long filter cycles mean Mainstream filters and strainers need significantly less servicing; all particles are contained inside the basket (or bag) for quick, easy disposal. The Mainstream housing stays in the processing line; only the basket is removed during change-over. The end result is more efficient separation, faster throughput, and reduced media change over.

Materials
Product wetted steel parts316L
Other steel parts304
Finish32 μ-inch (0.8 mm) Ra on product contact surfaces
Product wetted sealsBuna, EPDM, SFY (Fluorelastomer)
OtherSEF cam lock - UHMW
     Optional Aluminum Bronze
Relief valve handle - UHMW
     Optional Aluminum Bronze


Dimensional Data
ModelInlet/Outlet
Diameter

(in)

A

(in)

B

(in)

C

(in)

D

(in)

E

(in)

Short25 11/1635⅜19¼827¼
35 11/1635⅜19¾827¾
46 5/1635⅜20¼828¼
Long25 11/1651⅜35¼843¼
35 11/1651⅜35¾843¾
46 5/1651⅜36¼844¼

Note: Mainstream filter/strainer stand optional. Order separately.

Effective Filter Area
Short1.7 ft2
Long3.8 ft2
Nominal Temperature & Pressure Ratings
Buna N GasketsFluorelastomer/Silicone Gaskets
Temperature rating200ºF300ºF
Max working pressure at 70ºF200 psi200 psi
Max working pressure at 190ºF80 psi-
Max working pressure at 350ºF-50 psi

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