Piping and Valves4

4.2.4

Installation

4.2.4.1

Installation type

For the direction of flow and the

suitability for vertical and/or

horizontal installation, please

refer to section 4.2.2.3.

4.2.4.2

Installation positi-

on

The installation position is

determined by:

The function of the valve

Functional framework

conditions

Accessibility and operability

These three criteria are of equal

importance when selecting an

installation position for a valve.

All of them have to be taken into

account for an acceptable project

solution.

Function of the valve

The first point to consider when

selecting an installation position

for a valve is its operational

The following examples serve to

illustrate this point:

The gate valve at the discharge

side of the pump serves to

close the pipe if the pump or

swing check valve needs to be

repaired. It should ideally be

located immediately

downstream of the pump and

swing check valve. However,

the functional framework

conditions (maximum fluid

level in the pump sump) and

the operability require a

different (higher) position.

The swing check valve should

ideally be located directly

downstream of the pump, as

mentioned above. Again, the

fluid level and accessibility

demand a more practical

location in the piping.

The position of the aeration

and vent valve should always

be selected from an

operational point of view,

which is at the highest point of

the piping. Suitable structures

to provide accessibility must be

provided.

Functional framework

conditions

The installation position can be

determined by functional

framework conditions.

For example:

Installation criteria provided

by the valve manufacturer

(vertical/horizontal)

Routing of the discharge line

If the discharge line has a long

vertical section, the swing

check valve must not be

installed at a low position in

the vertical pipe axis as the

function of the swing check

valve will be impaired by

deposits of contamination

(sand, stones, sludge). Stones

falling back down onto the

valve could also cause some

direct damage. In this case, the

swing check valve should be

fitted in a horizontal pipe

section which has to be

planned for in the piping

layout.

Maximum fluid level

Individual discharge lines

joining collecting lines

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