Penberthy Sight Flows and windows for visual indication

Penberthy offers one of the industry’s most complete lines of sight flow indicators and sight windows with our FLUIDVISION™ product line. They include ANSI, Teflon®/Tefzel® lined, FM approved dual-window, armored, full-view, threaded window and low-flow gaseous models. All popular sizes and materials of construction available, with flanged, threaded and special connections, as well as rotator, flapper, drip-tube or plain indicator styles. Also includes threaded, oblong and conventional sight windows.

For common process flow stream pressures, use the industry standard.
Available in NPT threaded-end and flanged designs, these Sight Flow Indicators meet most standard installation requirements. Made from single-piece, cast-construction bodies, these SFI's are available with all five styles of Penberthy indication. Ball type indicators should be mounted in a vertically upward or horizontal flow orientation.

Models

SF Plain NPT Sight Flow Indicator

SFF NPT SFI (Flapper)

SFR NPT SFI (Rotator)

SFD NPT SFI (Drip Tube)

SFG NPT SFI (Gaseous)

SF-F Plain Flanged Sight Flow Indicator

SFF-F Flanged SFI (Flapper)

SFR-F Flanged SFI (Rotator)

SFD-F Flanged SFI (Drip Tube)

SFG-F Flanged SFI (Gaseous)

SFB Plain Ball Type SFI

SFB-F Flanged Ball Type SFI Powerful flow streams are mastered by heavy-duty construction. Available in flanged models only, these Sight Flow Indicators meet tough ANSI standards for 300# and 600# requirements. Made from single-piece, cast-construction bodies, these SFIs are available with all five styles of Penberthy indication. Models 300# SM-F Plain Flanged Sight Flow Indicator SMF-F Flanged SFI (Flapper) SMR-F Flanged SFI (Rotator) SMD-F Flanged SFI (Drip Tube) SMG-F Flanged SFI (Gaseous) SFB Plain Ball Type SFI SFB SFB-F Flanged Ball Type SFI SFB-F

Dual-Window Sight Flow Indicators provide two glass discs on each side, so that if either glass should fail for any reason, the other window can temporarily withstand pressures until the unit can be repaired or replaced. Dual-Window Sight Flow Indicators and Factory Mutual System Approved Dual-Window Sight Flow Indicators are available in 150# NPT Models and 150# and 300# Flanged Models. FM-Approved 150# units are rated for 150 psig. FM-Approved 300# units are rated for 300 psig.

Models
150# NPT Dual-Window

DWF	Plain Dual-Window NPT SFI
DWFF	Dual-Window NPT SFI (Flapper)
DWFR	Dual-Window NPT SFI (Rotator)
DWFD	Dual-Window NPT SFI (Drip Tube)
DWFG	Dual-Window NPT SFI (Gaseous)

Dual windows are comprised of two glass discs held in position by a metallic housing, internal shims and gaskets (pictured above).

The double, tempered glass window design provides added protection in applications where there is:

External mechanical impact - if the outer glass is cracked or shattered, the inner glass can temporarily continue in service until the unit can be repaired or replaced.

Abnormal compressive forces - in maintenance or replacement situations, the housing assists in alignment of the glass and can absorb uneven or excessive compression.

Thermal shock - in high temperature applications the inner and outer glass protect one another from an extreme thermal gradient. The air pocket between the glass provides an insulative effect.

Corrosion/erosion - if the inner glass is weakened and it breaks, the outer glass can temporarily contain the fluid, withstand the pressure, and continue in service until the unit can be repaired or replaced.

Full-View Sight Flow Indicators provide maximum, 360° viewing of fluid dynamics.
Available in NPT threaded-end and flanged designs, these Sight Flow Indicators are designed to enhance the visibility of process media as it passes through the glass cylinder. Full 360° viewing area expands the number of positions and locations in which the unit can be mounted for full visibility.

SNV	Plain NPT FV Sight Flow Indicator
SNVD	NPT FV SFI (Drip Tube)
SNL	Plain Large Cylinder FV SFI
SNV-F	Plain Flanged FV Sight Flow Indicator
SNVD-F	Flanged FV SFI (Drip Tube)

The Full-View Sight Flow Indicators are recommended for low-pressure applications where maximum visibility is needed. In addition to standard length models, Penberthy offers customized lengths up to 48", in 1/8" increments.

Full-View Sight Flow Indicators are unique because the "character" of the liquid can be viewed. In other words, a typical sight flow allows observation of liquids through a glass pane. The Full-View sight flow allows observation of liquids in transit through a more dynamic, 3-dimensional pipeline. Designing the Full-View to match the pipe diameter streamlines the liquid flow through the sight flow and helps avoid solids settling.

Units are best suited for vertical applications. Horizontal mounting is acceptable if there is no mechanical strain imposed on the glass cylinder. Flange mounting studs are provided with SNV-F and SNVD-F flanged models for convenient flange-to-flange connections. Providing customized studs reduces the possibility of damaging the glass or flange by selecting an inappropriate bolt size or torquing the Full-View Sight Flow Indicator beyond its proper limit. To enhance quality and performance, the Full-View Sight Flow Indicator uses ductile iron rather than gray iron as the standard material of construction.

Please visit Anderson-Bolds for more information and to purchase Penberthy products.