Hydraulic Strainers, Diffusers, Breathers, Sight Glasses and Gauges


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

Donaldson suction strainers are zinc-plated, with stainless steel mesh screens and rugged steel core centres 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: 0-300 gpm / 0-1,140 lpm.
Outlet Port Size: 3/8″ NPT to 4″ NPT.
Stainless Steel Mesh.
Steel or nylon fittings.
Operating temperatures:
Steel fitting to 250ºF / 121ºC.
Nylon fitting to 210ºF / 100ºC.
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: 0-100 gpm / 0-380 lpm.
Outlet Port Size: 3/8″ NPT to 1¼” NPT or SAE-8 to SAE-20.
140 Micron Stainless Steel Mesh.
Steel SAE bushing.
Cast iron NPT bushing.
Operating temperatures to 250ºF / 121ºC.
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 250ºF / 121ºC
Flow Range: 0-450 gpm / 0-1,710 lpm


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: 29 psi / 200 kPa / 2 bar.
Transparent polyamid lens.
Anodized aluminum reflector.
Operating temperature 210°F / 100°C.
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” and 1″ NPT sizes.
Avoid alcohol and detergents containing alcohol.
Flat Buna-N® seal.
Working pressure: 500 psi / 3,450 kPa / 34.5 bar.
All nickel-plated steel construction.
Glass prism lenses hermetically sealed.
Maximum operating temp. 500°F / 260°C.


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.

Hydraulic T.R.A.P. Breather

T.R.A.P.™ Breather

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Hydraulic Strainers, Diffusers, Breathers, Sight Glasses and Gauges

Hydraulic Strainers, Diffusers, Breathers, Sight Glasses and Gauges

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