Jordan Valve Mark 6127 Series Pressure Reducing Valves - Manual

6. Y-Strainer (standard on water service valves)
or Inline Strainer (standard on fuel service
valves).The strainer protects the pilot system
from solid contaminants in the line fluid.
7 A/B. Two Ball Valves (standard on water service
valves, optional on fuel service valves),
useful for isolating the pilot system for
maintenance or troubleshooting.
At user option, the Mark 6127 may also be equipped
with the following:
1. Visual Indicator.
2. Limit Switch Assembly (includes visual
indicator).
3. Closing Speed Control
I
ntroductIon
The Jordan Valve Mark 6127 Pressure-Reducing/
Sustaining Valve is designed to perform the following
functions:
1. Reduce a higher upstream pressure into a lower,
constant downstream pressure.
2. Prevent upstream pressure from falling below
a predetermined minimum.
The 6127 consists of the following components:
1. Main Valve , a hydraulically-
operated, diaphragm-actuated globe or
angle valve which closes with an elastomer-on-
metal seal.
2. Pressure-Reducing Pilot , a two way, normally-
open pilot valve which senses downstream
pressure under its diaphragm and balances it
against an adjustable spring load. An increase
in downstream pressure tends to make the pilot
close.
3. Pressure Sustaining Pilot , a two way,
normally-closed pilot valve which senses
upstream pressure under its diaphragm and
balances it against an adjustable spring load.
An increase in upstream pressure tends to make
the pilot open.
4. Ejector , a simple "tee" fitting with a fixed orifice
in its upstream port. It provides the proper
pressure to the diaphragm chamber of the
main valve, depending on the position of the
pressure-reducing pilot.
5. Flow Control Valve , a needle type valve which
provides adjustable, restricted flow in one
direction and free flow in the opposite direction
On the 6127, the flow control valve is
connected as an opening speed control.
3170 Wasson Road • Cincinnati, OH 45209
Phone 513.533.5600 • Fax 513.871.0105 (f)
[email protected] • www.jordanvalve.com
I & M Mark 6127 Series
Installation & Maintenance Instructions for the
Mark 6127Pressure Regulating Valve
Warning: Jordan Valve Control Valves must only be used, installed and repaired in accordance with these Installa-
tion & Maintenance Instructions. Observe all applicable public and company codes and regulations. In the event
of leakage or other malfunction, call a qualified service person; continued operation may cause system failure or
a general hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized fluid. Before disassem-
bling a valve, be sure to release all spring tension.