Terminology – Badger Meter Research Control Valve User Manual

Page 13

PCV -

Pressure Control Valve

LCV -

Level Control Valve

TCV -

Temperature Control Valve

FCV -

Flow Control Valve

Topworks (Actuator) -

The assembly that provides force

Positioner -

Instrument added or attached to topworks for more precise control

ATO -

Air to Open. Increasing air signal opens valve

ATC -

Air to Close. Increasing air signal closes valve

F/O -

(Fail Open) Valve opens on air failure

N/O -

(Normally Open) Valve opens on air failure

F/C -

(Fail Close) Valve closes on air failure

N/C -

(Normally Close) Valve closes on air failure

Body Bonnet Assy -

That assembly consisting of body, bonnet, gasket, innervalve, stem, seat, packing,

gland and yoke nut

Trim Set -

The interchangeable components in a set consisting of innervalve, stem and seat

=% -

Equal Percentage. Lift versus flow characteristic

Lin. -

Linear lift versus flow characteristics

Q.O. -

Opening - ON-OFF service

P1 -

lnlet pressure to valve

P2 -

Downstream pressure from valve

HP - Delta P - Pressure drop across valve

Flow Coefficient - Water flow at 1 PSI pressure drop

Chevron Rings -

Packing, molded V-rings (normally 3 per set)

Braid Tef. -

Packing, rope-type braided Teflon with Teflon suspensoid lubricant

TERMINOLOGY