Brass Conical Unions
A brass taper union consists of two brass bodies and a nut and gives a detachable joint without cutting the line through its taper seat.
It is used to connect equipment that needs maintenance, such as combi boilers, water heaters, meters, pumps and filters. It is supplied in 11 sizes from 1/8″ to 3″.
Main Applications
- Combi boiler and calorifier unions
- Water meter inlets and outlets
- Pump and booster set connections
- Filter and treatment unit separation
- Service points on compressed air equipment
- Manifold and distributor connections
Technical Data
| Fitting type | Taper seat union: two bodies and a nut |
|---|---|
| Thread | Female / male, G or R (depending on model) |
| Sizes | 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″ (product range) |
| Material | Brass CW617N (similar manufacturer sheet; depending on model) |
| Nominal pressure | PN16 (similar manufacturer sheet) |
| Max. working temperature | 160 °C (similar manufacturer sheet) |
| Surface | Natural brass |
| Seat | Taper, metal-to-metal (depending on model) |
| Nut | Hexagonal brass |
| 4″ size | Please ask |
| Installation | Ends with thread sealant, nut tightened dry |
| Media | Water, heating water, compressed air |
Material Options
| Part | Brass | Nickel-plated brass | Stainless (AISI 304) |
|---|---|---|---|
| Body | Brass CW617N (depending on model) | Brass body, nickel plated (depending on model) | AISI 304 stainless steel |
| Surface | Natural brass | Nickel plating | Uncoated stainless |
| Thread | Female / male, G / R (depending on model) | Depending on model | ISO 7-1 |
| Pressure rating | PN16, max. 160 °C (similar manufacturer sheet) | Depending on model | 20 bar −20…+38 °C (ISO 4144) |
| Suitable media | Domestic water, heating water, compressed air | Visible fixture connections | Food, chemicals, seawater |
Which material? As the taper seat needs no gasket, it stays tight for a long time in hot water and heating lines; a stainless union is chosen for aggressive media.
Advantages
Fast Equipment Removal
- Opening the nut separates the device from the line
Gasket-Free Seat
- The taper face can be retightened
11 Sizes
- From 1/8″ to 3″
Installation Without Turning Pipe
- Tightened with the nut, pipes stay fixed
Construction and Design Features
- Two brass bodies with taper faces and a hexagonal nut
- The bodies seat axially as the nut is tightened
- Forged brass parts (depending on model)
- Installation without welding
Send the union size and quantity; we will confirm the suitable brass taper union from stock.
How to Choose?
- Define the removal pointPlan a union at every piece of equipment that needs maintenance, such as boilers, meters and pumps.
- Measure the sizeDetermine the size of the pipe or equipment port.
- Check the end typesDecide whether each end of the union should be female or male threaded.
- Confirm the mediumUse brass unions for water, heating and air.
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Why ORFA?
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