Reservoir Breathers, Sight Glasses and Gauges │Donaldson Hydraulics

Overview

Reservoir protection is a team effort, suction strainers protect pumps from damage. Diffusers reduce aeration, foaming, turbulence and noise caused by return lines. Sight and level gauges offer an inside view of fluid levels. Plugs, caps and vents can be used with power units and gearboxes. Fillers/breathers give you access in – while keeping contaminants out – as reservoirs cycle through fluid level changes.

Suction Strainers

Our suction strainers are zinc-plated, with stainless steel mesh screens and rugged steel core centers epoxy bonded to heavy gauge connector and end caps. Suction strainers filter petroleum-based hydraulic fluids, phosphate esters, water glycols, lubricating oils, coolants, and fuels in fluid reservoirs, sumps and similar applications. They are cleanable and reusable.

Rugged, durable construction
Filters petroleum-based hydraulic fluids, phosphate esters, water glycols, lubricating oils, coolants, fuels and water in fluid reservoirs, sumps and similar applications
Cleanable and reusable
Flow Range: 0 to 1,140 lpm / 0 to 300 gpm
Outlet Port Size: 3/8 in. NPT to 4 in. NPT
Stainless Steel Mesh
Steel or nylon fittings
Operating temperatures:
- Steel fitting to 12° C / 250° F
- Nylon fitting to 100° C / 210° F
Relief valve available
Zinc-plated, with stainless steel mesh screens
Steel core centers epoxy bonded to heavy gauge connector and end caps

Tank Mounted Strainers

You can mount these units through a sidewall or through the tank top and into a standpipe. Tank mounted strainers offer easy installation. Access to reservoir interior is not needed.

Rugged, durable construction
Easy installation
Access to reservoir interior is not needed
Can mount units through a sidewall or through the tank top and into a standpipe
Flow Range: 0 to 380 lpm / 0 to 100 gpm
Outlet Port Size: 3/8 in. NPT to 1¼ in. NPT or SAE-8 to SAE-20
140 Micron Stainless Steel Mesh
Steel SAE bushing
Cast iron NPT bushing
Operating temperatures to 121° C / 250° F
Relief valve available

Diffusers

Diffusers are highly effective in reducing aeration, foaming, turbulence and noise caused by return lines. Reservoir baffles can usually be eliminated, provided that the holes in the tube are positioned facing away from the pump suction inlet and below the reservoir oil level. Can be vertically or horizontally mounted with discharge side directed away from suction and preferably toward a tank wall or bottom.

Rugged, durable construction
Highly effective in reducing aeration, foaming, turbulence and noise caused by return lines
Reservoir baffles can usually be eliminated, provided that the holes in the tube are positioned facing away from the pump suction inlet and below the reservoir oil level
Can be vertically or horizontally mounted with discharge side directed away from suction and preferably toward a tank wall or bottom
Perforated Steel
Cast iron bushings (TMD-tank mount)
Zinc-plated steel (DFD-return line)
Operating temperatures to 121° C / 250° F
Flow Range: 0 to 1,710 lpm / 0 to 450 gpm

Breathers

Breathers are available in a variety of styles, materials and sizes. They provide clean airflow into reservoirs and other storage containers where there is an exchange of air during changing fluid levels. In high moisture sites or applications with large changes in machine environments, breather caps with pressure relief and vacuum breakers limit air exchange and provide a positive suction head at the pump inlet.

T.R.A.P.
ABS, MBS Series
PBS Series Pressure Filler Breather Cap – screw in style
Filler Breather Caps
Filler Breather Assemblies
ABB Series Filler Breathers – bayonet style
Chrome ABB Series Filler Breathers – bayonet style
Mini Filler Breather
Non-Vent Filler Cap – bayonet style
Filler Breather
PBB Series Pressure Filler Breather Cap – bayonet style
Weld risers for filler breathers

Sight Glasses

Leak-free sight glasses come in plastic or metal with a variety of threads, seals and lenses. In low visibility areas, prism lens sight glasses are a good solution for quick and accurate readings. In applications involving high pressure or temperatures, steel sight glasses are preferred. Locking nuts provide mounting into sheet metal with minimum thickness and without welding.

Sight Glasses

Shock resistant/leak-free
For use with mineral, petroleum and water-based fluids
Good solution for quick and accurate readings in low visibility areas
Steel sight glasses are preferred for high pressure or temperatures applications
Locking nuts provide mounting into sheet metal with minimum thickness and without welding
Working pressure: 2 bar / 29 psi
Transparent polyamide lens
Anodized aluminum reflector
Operating temperature 100° C / 210° F
Buna-N® seal
Any contact with alcohol or solvents must be avoided
Design HFTX
Available in plastic or metal with a variety of threads, seals and lenses

Prism Sight Glasses

For low light applications
Resistant to solvents, oils, greases, alkaline acids
Leak-proof service
Greater mechanical strength
Easy installation
Reflects light in the presence of any liquid
Suitable for petroleum and water based fluids
Prism lenses: special translucent polyamide technopolymer
Body: special black polyamide technopolymer
Available in ¾ in. and 1 in. NPT sizes
Avoid alcohol and detergents containing alcohol
Flat Buna-N® seal
Working pressure: 34.5 bar / 500 psi
All nickel-plated steel construction
Glass prism lenses hermetically sealed
Maximum operating temp. 260° C / 500° F

Fluid Level Gauges

Donaldson offers a wide variety of fluid level gauges to accurately measure fluid levels in tanks and reservoirs. Gauges are made with transparent lens material, are suitable for lubricants, mineral, petroleum or water based fluids and offer 180° visibility of fluid level.