Repair set seat butt. Valve DN150/60

Introduction

The following information and instructions are important for perfect installation and safe operation of the valve. Prior to installation and initial use of the valve, the gualified staff in charge of installing and operating the valve has to be instructed according to this information.

Proper use

The soft-seated butterfly valve series K may only be used to stop, throttle and control media flows within the permissible pressure/temperature limits

From DN 200 the use of seats with higher shore hardness is necessary at a differential pressure of more than 13 bar.

Lug type valves: Max. differential pressure 6 bar for valves used in an end-of-line function.

KG2 / KG4 and valves from DN 600: Max. differential pressure 10 bar.

The suitability of the product-related parts used and their chemical resistance properties have to be clarified before start-up of the plant. The usual flow rate must not be exceeded. Vibrations, water hammers and Cavitation as well as abrasive components result in damage of the valve and affect its service life.

Valves must not be used to support the pipeline nor as a step-up.

This includes the different kinds of operation like hand levers, gear operators, actuators, feedback and control systems.

When using a hand lever, handwheel and manual emergency operation, take care that there is enough space for a proper operation.