Control Valve

A control valve is comprised of an actuator mechanism that is capable of changing the position of flow controlling element in the valve. The valve modulates flow through movement of a valve plug in relation to the port(s) located within the valve body. The valve plug is attached to a valve stem, which, in turn, is connected to the actuator. The actuator, which can be pneumatically or electrically operated, directs the movement of the stem as dictated by the external control device.

Types of Control Valve

Control valvesĀ are available in different types and shapes

Diaphragm Actuator
Pneumatic Actuator
Electric Actuator

Specification of Control Valve

EN ISO 9001:2000
PED 97/23/EC Module H
DIN EN 161, DIN 3394
TA-Luft VDI 2440 (Clean Air Act) / DIN EN ISO 15848-1
ATEX 94/9/EC, Machinery directive 98/37/EC
DIN, EN, AD-Merkblatt 2000, ANSI, ASTM, ISA
SIL 3 / 4 acc. to IEC61508
DNV Type approval (for classification of ships)
EN 1349, EN 60534
Size Range: 0.5 to 16
Pressure Class Range: 150 and 300
Cast IronCast BronzeTitanium
Carbon SteelStainless SteelAluminium
Ductile IronDuplex Stainless SteelPVC
Water treatment and distributionPaper and pulp industry
Chemical industryShipbuilding
Petrochemical plantsGas distribution
Power/ Hydro electrical/ Nuclear plantsGeneral services
Ability to throttle or control the rate of flow
Lack of turbulence or resistance to flow when fully open - turbulence reduces head pressure
Quick opening and closing mechanism - rapid response is many times needed in an emergency or for safety
Tight shut off - prevents leaks against high pressure
Ability to allow flow in one direction only - prevents return
Opening at a pre-set pressure - procedure control to prevent equipment damage

Brand of Butterfly Valve

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