Treloar Products

We specialise in engineering and supplying reliable critical fluid transfer equipment for tank trucks, service stations, terminals, depots, gas production plants and more.

Click on the product category or search for the product you are after and view the products below.

  • Tank Truck Equipment
  • Service Station Equipment
  • Nozzles & Dispensing Equipment
  • Terminal & Depot Equipment
  • Fluid Transfer Fittings
  • Valve Products
  • Projects

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Order codes Spares

1400 - Standard

1500 - Hi-pressure










A quick, reliable and inexpensive way to verify flow rate and direction & monitor colour and clarity in fluid lines.

Dollar for dollar, sight flow indicators are the most cost efficient and effective way to visually monitor the flow of fluids and to determine where, if any, problems exist at certain points along the industrial process line. Applications include:
Chemical industry, power plants, petroleum industry, waste water treatment, manufacturing and OEM Markets.


Easy Access bolt on design:

VISI-FLO’s® unique bolt-on design fastens the face plate assembly directly to the body with no special torqueing sequence. This provides quick, complete access to the unit from the front side, which gives companies the flexibility to install VISI-FLO® in locations where other sight flow indicators cannot be installed due to clearance problems. Tie rod design sight flow indicators present challenges when it comes to fastening the lens and seal to the body.

No Leak guarantee:

Due principally to the failure of conventional flat seals, the complaint most often registered against sight flow indicators is that they leak. VISI-FLO® is guaranteed not to leak for three full years under normal use. The key design attributes that enable OPW’s innovative radial sealing design is so good, it’s guaranteed not to leak!

Maintenance-Free Design:

Visi-Flo’s unique, bolt-on-body design requires no special maintenance or torqueing sequence be followed to prevent leaks. This results in a safer, more reliable sight flow indicator than units using tie rods to fasten lens and seal to body.


Sizes:  1/4" to 12"
Body Material: Carbon Steel, Bronze, 316 Stainless Steel, Ductile iron
Pressure: Up to 600PSI
Seals: Viton, Nitrile, Neoprene, EPT, Teflon, FFKM
Connection: Threaded or flanged

Four Indicator Styles:

• Propeller – The best way to show flow of opaque liquids. Ideal for observation at a distance. Flow from right to left is standard. Specify if left to right flow is needed. Not recommended for flow rates above 100 GPM.
• Bi-Directional Flapper – This indicator points in either direction to show you at a glance which way the liquid is flowing.
• Bi-Directional Plain – When the colour and clarity of your liquid are of prime importance.
• Drip Tube – Ideal for gravity, extremely low or intermittent flow. Keeps product from dripping on the glass. Assures constant see-through for vertical lines.

Latest news

Jun 20, 2022
A nitric acid transfer solution for Malindra Group
We often get called in by customers who are using a product that hasn’t been working for them. There’s nothing more we love than problem-solving and finding a solution that works!  

Jun 02, 2022
Problem-solving for the Koppers Australia - Newcastle Plant
The team at the Koppers Australia - Newcastle Plant recently approached us with a tricky challenge. They advised they have a need to load and unload ships with products that are quite difficult to deal with without damaging the ship loading hoses and spilling product. 

May 04, 2022
Unique design solution to onsite mining challenge
Treloar was recently approached by engineering firm, Aspec, to come up with a structural solution for BHP for an onsite mining challenge.

Apr 04, 2022
Progress Update: Wesfarmers-CSBP liquid ammonia loading arms
In December 2021 we shared our initial case study on our project for Wesfarmers-CSBP who had successfully been using a Treloar solution for their liquid ammonia transfer system since 1998. In 2021 Wesfarmers approached Treloar with a need for emergency breakaways, which led to a plan to address ...

Dec 08, 2021
Case Study: Wesfarmers-CSBP liquid ammonia loading arms
Wesfarmers-CSBP has been using a Treloar solution for their liquid ammonia transfer system since it was originally installed in 1998 when Treloar worked with an international supplier to deliver many cutting edge projects and introduce new technologies to Australia. In this case, it was for Ammonia ...