STERIFLOW Mark 96A Series Installation & Maintenance Instructions

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
steriflow@richardsind.com • www.steriflowvalve.com
Warning: Steriflow Sanitary Pressure Regulators must only be used, installed and repaired in accordance with these
Installation & 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 disas-
sembling a valve, be sure to release all spring tension.
Please read these instructions carefully!
Your Steriflow/Jordan product will provide you with long,
trouble-free service if it is correctly installed and main-
tained. Spending a few minutes now reading these in-
structions can save hours of trouble and downtime later.
When making repairs, use only genuine Steriflow Valve
parts, available for immediate shipment from the factory.
Introduction
The MK96A is an air loaded sanitary pressure regulating
valve (PRV) remote operated. Traditional sanitary PRV's
are normally operated and have an adjustment knob
that adds or subtracts tension to a spring. The spring sits
on a platform on top of a diaphragm that is connected
to a stem and valve plug. The opposite, wetted side of
the diaphragm is exposed to the outlet side of the valve
(downstream pressure). Increasing the tension on the
spring moves the diaphragm and stem in the opening
direction, conversely increasing the downstream pres-
sure required to close the valve. Stated another way,
increasing the spring tension, increases the valve's outlet
pressure set point; and decreasing the spring tension,
decreases the set point pressure.
The typical sanitary PRV installation location is several
feet above grade (clean steam tubing), not easily acces-
sibly because of obstructions, or is un-accessible because
of it's location in a manufacturing suite. Adjustment of a
manual regulator is time consuming, or nearly impossible
in these installations, The MK96A was invented to solve
this access problem. It uses a remote mounted, adjustable
air pressure source instead of a manually adjusted spring
to apply force to the diaphragm stem and plug. Increas-
ing the air pressure on top of the diaphragm, increase the
valve's outlet set point pressure, and decreasing the pres-
sure, lowers the outlet pressure set point.
To enable the valve's operation and adjustment, an air
line is connected to the 1/4" air inlet (22) and an air
regulator* (remotely installed at grade) is used to adjust
the MK96A set point. Alternatively, the MK96A is also
offered with an I/P option, allowing the user to remotely
drive the air pressure with a 4-20 mA signal from distrib-
uted control system (DCS) or PLC logic.
* air regulator must be a self-relieving type
I & M Mark 96A Series
Installation & Maintenance Instructions for
Mark 96A Sanitary Pressure Regulators
MK96A Ideal Installation
6
3
7
1
By-Pass Line
1
1
5
T
Condensate Return Line
MK 96A Preferred Installation
1. The valve is designed for sanitary service and it is as-
sumed that it will be installed into a clean tubing sys-
tem. Under these conditions, special considerations
to protect the valve such as providing line strainers
at the valve inlet are not necessary.
2. The regulator should be installed with the inlet (bot-
tom of valve) vertical and the outlet horizontal. This
orientation allows unhindered drainage (zero hold-
up). Please note the valve will function in any posi-
tion. Contact factory for other possible orientations.
3. Steam regulators are best located at the highest
point in the piping with the take-off out of the top of
the steam header. This will minimize the possibility of
retained water in the regulators flow stream.
4. For best control, 3'-0" straight sections of pipe
should be installed on either side of the regulator to
insure a non-turbulent flow profile.
5. Use caution in tightening commercial sanitary
fittings. Over-tightening can cause the gasket to
extrude into the flow passage.
2
4
1
R
1 Shut-off Valve
2 Pressure Gauge
3 Steriflow Regulator
4 Relief Trap
6 Air Signal
7 Steam Separator