Watts 6115-7JM User Manual

Technical bulletin

8550 Hansen Road . Houston, TX 77075 . Telephone 713.943.0688 . FAX 713.944.9445 www.wattsacv.com

Technical Bulletin

Pressure Reducing & Downstream

Surge Control Valve

The Automatic Answer to Fluid Control

Model 6115-7JM

Part Number List

Item Description

Complete Assembly

Repair Kit

Model 6115-7JM

234802

3313-01

Reducing Pilot

0661-01

221101

Surge Control Pilot

0680-02

221201

Operation

The Model 6115-7JM is designed to automatically reduce a fluctuating higher upstream (inlet) pressure to a constant
lower downstream (outlet) pressure and will rapidly modulate towards a closed position if downstream pressure
suddenly becomes greater than the desired regulated setpoint. The quick closing action prevents possible damaging
high pressure from passing through valve. Regulating action is controlled by a normally open Pressure Reducing
Pilot designed to: 1) Open (allowing fluid out of the main valve cover chamber) when downstream pressure is below
its adjustable setpoint, and, 2) Close (allowing fluid to fill the main valve cover chamber) when downstream pressure
is above its adjustable setpoint. A decrease in downstream pressure causes the valve to modulate towards an open
position, raising downstream pressure. An increase in downstream pressure causes the valve to modulate towards a
closed position, lowering downstream pressure.

If downstream pressure suddenly becomes greater than the desired regulated setpoint, the normally closed Surge
Control Pilot opens and rapidly admits higher inlet pressure into the valve cover, increasing rate of valve closure.
Normal pressure reducing operation resumes when downstream pressure is again below the desired regulated
setpoint.

Components

1) Main Valve
2) Reducing Pilot
3) Supply Orifice
4) Adjustable Opening Speed
5) Position Indicator
6) Flow Clean Strainer
7) Ball Valve
8) Surge Control Pilot

Closes Valve
Opens Valve

Flow

Flow Direction: Under the Seat