# How do you calculate low loss header size?

## How do you calculate low loss header size?

The length of your low loss header should then be a simple calculation based on 4 x diameter. This is the minimum separation between your flow and return and, again, you can size up.

Should I fit a low loss header?

The header should be sized so that the pressure loss at full flow is small. All secondary circuit flows and the flow from the boilers should normally be at the top, or one end of the header.

When would you need a low loss header?

You would likely need a low loss header if you have a very large home or business premises and you’re using a low water content boiler. Your low loss header will need to be sized correctly depending on the flow rate of water around the building.

### Do I need zone valves with a low loss header?

A more simple way of connecting multiple circuits to a low loss header, without the need for zone valves or non-return valves that could potentially fail, is to install a distribution header. This is simply where the common pipe connecting the different circuits is sized, again, for a low velocity (sub 0.5mps).

What is a low pressure header?

Low Pressure. Header. The Swagelok low pressure header (LPH) is a manifold that provides a means of distributing or collecting a system fluid using a lightweight, 316 stainless steel body. An LPH connects several users to the system fluid.

What is a header on a boiler?

A header transfers a heat transfer medium (water, steam, oil, etc.), typically via pipe(s), between (one or more) boilers and (one or more) points where the heat is required. A header can connect a single boiler to a single point where heat is needed.

#### What are the benefits of a low loss header?

The purpose of a low loss header is to enable hydraulic separation between the boiler & heating circuit. The low loss header helps to improve the performance & efficiency of the heating system. Furthermore, it helps regulate the system’s flow rate & pressure.

What is a low loss header for?

In fluid mechanics, pressure head is the height of a liquid column that corresponds to a particular pressure exerted by the liquid column on the base of its container. It may also be called static pressure head or simply static head (but not static head pressure).

## What is the purpose of steam header?

Steam exits the boiler through piping referred to as the steam header. The header also serves as a reservoir that feeds steam to the individual heating circuits. The steam header must be large enough to virtually eliminate pressure drop between the boiler and the beginning of the circuit.

What does a hydro separator do?

The Hydraulic Separator is multi-purpose equipment that replaces several components in the system, simplifying piping and reducing installation time. BENEFITS, FEATURES AND FUNCTIONS: Hydraulically separates primary and secondary circuits. Separates and vents air from the system.

What is the function of header in boiler?

### When to use a Vaillant low loss header?

Vaillant low-loss headers are only suitable for new clean systems up to 70kW net input with correctly inhibited water. These heating systems may have different temperature and flow-rate requirements (e.g. Underfloor Heating and radiator circuits).

What does a low loss boiler header do?

When used in conjunction with Viessmann boilers, the low-loss header acts as hydraulic break, decoupling boiler and system circuits from each other. The low-loss header increases operational efficiency. In addition, the low-loss header helps eliminate debris from the heating system.

Why do you need a low loss header?

These heating systems may have different temperature and flow-rate requirements (e.g. Underfloor Heating and radiator circuits). Cooler return water from the heating circuits is mixed with water from the boiler in the low-loss header. An NTC is used to monitor the temperature of water supplied by the boiler to maintain a steady flow temperature.

#### How is water mixed in a low loss header?

Cooler return water from the heating circuits is mixed with water from the boiler in the low-loss header. An NTC is used to monitor the temperature of water supplied by the boiler to maintain a steady flow temperature.