Panel Mounted Valve, 45° Nozzle & 90° Elbow for Fume Hood

Quick Answer: The Panel Mounted Valve, 45° Nozzle & 90° Elbow for Fume Hood is a service fitting for laboratory fume hoods: the valve is controlled from a panel on the outside of the hood while its outlet, a nozzle angled at 45°, delivers the service inside, with a 90° elbow in the line between them.

Controlling a Service Without Reaching In

A fume hood protects its user by keeping the sash low and air flowing in. Every time someone reaches inside to open a tap, the sash goes up and an arm and sleeve enter the contaminated space. A fume hood panel mounted valve avoids this by putting the control handle on the hood’s front panel or side post, outside the sash, while the outlet is inside, so the cooling water to a condenser or the gas to a burner can be adjusted with the sash kept down.

The 45° nozzle is angled downward into the hood, directing the tubing towards the work surface rather than straight across the working space, so it hangs neatly to the apparatus. The 90° elbow is the fitting that turns the line through a right angle behind the panel, letting the service run from the valve to the nozzle within the hood’s structure. The listing does not state which service the valve is for (water, gas, air or vacuum), whether the three parts come as a set, or the connection sizes, so these must be settled before ordering; gas service in particular needs a valve rated for gas and installation by a qualified gas fitter.

Valves on the hood’s panel should be colour-coded or labelled by service, so gas cannot be confused with water or air. On the exhaust side, the Duct Damper for Fume Hood sets the air volume, and cooling water from a condenser can drain to an Oval Sink or Cup Sink set in the work surface.

Specifications

Applications

• Supplying cooling water to condensers inside a fume hood during reflux and distillation.
• Controlling gas to a burner inside the hood without raising the sash.
• Providing compressed air or vacuum to apparatus in the hood.
• Refitting older hoods whose controls sit inside the working area.

Care & Handling

• Label or colour-code each panel valve by service, and check the labels after any refit.
• Run tubing from the 45° nozzle directly to the apparatus and clamp it, since loose tubing can whip when the valve opens.
• Open water valves gradually to avoid blowing tubing off condensers.
• Have gas valves installed and leak-tested by a qualified gas fitter.

Why Choose LabEquip

Fume hood manufacturers and labs upgrading hood services are the usual buyers of panel-mounted valves. LabEquip lists these fittings in General Lab Products.

Frequently Asked Questions

Why mount a fume hood valve on the outside panel?

So the service can be adjusted without raising the sash or reaching into the hood. This keeps the user’s arms out of the contaminated space and preserves the hood’s airflow.

What is the 45° nozzle for?

It angles the outlet downward inside the hood, so tubing leads towards the work surface and the apparatus instead of running across the working space.

What does the 90° elbow do?

It turns the service line through a right angle, typically behind the hood’s panel, so the supply can run from the external valve to the internal nozzle.

Which services can the valve be used for?

Panel valves are used for water, gas, compressed air and vacuum, but each valve must be rated for its service. The listing does not state the service for this one, so confirm it at enquiry.

Can a water valve be used for gas?

No. Gas valves must be designed and rated for gas, and using a water valve on a gas line risks leaks. Any gas fitting should be installed and tested by a qualified gas fitter.

How are panel valves identified?

By colour-coded handles, buttons or labels showing the service. Every outlet on a hood panel should be clearly identified so that gas is never confused with water or air.

Last Updated: September 2026