Jordan Valve STERIFLOW Mark 95LL Series Installation and operating instructions

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone [phone] • Fax [phone]
sterifl[email protected] • www.steriflowvalve.com
I & M Mark 95LL Series
1-1/2” to 3” Valves
Installation & Maintenance Instructions for
MK95LL Sanitary Back Pressure Regulators
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 disassem-
bling a valve, be sure to release all spring tension.
**VIP** - If you purchased your MK95A Valve, or any stem repair component for this valve after 9/17/2018 -
please see assembly instruction change on page 2, top-right, section 3.
Please read these instructions carefully!
Your Steriflow product will provide you with long, trouble
free service if it is correctly installed and maintained.
Spending a few minutes now reading these instructions
can save hours of trouble and downtime later. When
making repairs, use only genuine Jordan Valve parts,
available for immediate shipment from the factory.
Ideal Installation
1. The valve is designed for sanitary service and it is
assumed that it will be installed into a clean system.
Under these conditions, special considerations to
protect the valve such as providing line strainers at
the valve inlet are not necessary.
2. The regulator is to be installed with the inlet
horizontal and the outlet pointed down. This will
provide the best drainage inside the valve. These
restrictions apply only for drainage considerations;
the valve will function in any position. 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
water in the regulator.
4. For best control, 3’ 0” straight sections of pipe
should be installed on either side of the regulator.
5. Use caution in tightening commercial sanitary
fittings. Over-tightening can cause the gasket to
extrude into the flow passage.
6. If possible, install a relief valve downstream from the
regulator. Set at about 30% above the control point
of the regulator.
7. Operate the regulator within its pressure and tem-
perature rating as stamped on the valve nameplate.
Start Up
1. Slowly open the inlet shutoff valve and slowly turn
the adjusting screw until the desired inlet pressure
is shown on the inlet pressure gauge, without dis-
charging fluid.
2. To change the controlled pressure, turn the adjusting
block (28) with handles (43) clockwise to increase
the pressure, or counterclockwise to decrease the
pressure.
3. See section on cleaning cycle for lift cam instructions
and usage. (see section on Clean-In-Place/ Steam-In-
Place.)
Maintenance
Caution: Make certain that there is no pressure in the
valve before loosening any fittings or joints. The following
steps are recommended:
1. Close the inlet shutoff valve.
2. Turn the adjusting block (28) counterclockwise until
there is no pressure on the spring, allowing any
trapped pressure to release downstream.
3. Allow pressure to bleed off through the down-
stream piping. Do not attempt to reverse the flow
through the valve by bleeding pressure from the
upstream side of the valve.
4. When the pressure gauges indicate that all pressure
has been removed from the system, close the outlet
shutoff valve. The valve may be removed from the
line and serviced.
Note: refer to the drawing at the end of this document
for description and proper orientation of parts.
PROTECT VALVES WITH LINESTRAINERS

-2-
Clean-In-Place
To open the valve to open for cleaning, unscrew one of
the handles (43) from the adjusting block (28) and screw
it into the cam (30). Pull the handle (43) down and
towards you without rotating the adjusting block (28).
Secure the cam in the open position (see detail on back
page) with the ¼” self locking pin (39). This will unseat
the plug and allow cleaning media to freely flow through
the valve. When cleaning is complete, remove the ¼”
self locking pin (39) and raise the handle (43) straight up
without rotating the adjusting block (28). Remove handle
(43) from cam (30) and screw it back into the adjusting
block (28).
Note: when the cam lever is in the down position the
valve will not regulate!
Disassembling the Valve
1. Follow the instructions under the “Maintenance”
section to remove the valve from line.
2. Turn the adjusting block (28) counterclockwise to
remove the load from the range spring.
3. Remove the cam (30) by pulling out the 3/8” self
locking pin (38). Lift the adjusting block (28) off and
set aside. Remove HHCS (15) and set aside.
4. Remove the spring housing (42), spring guide (33),
bearings (35)(36), and spring (9). Set parts aside.
5. Remove the cam connector (41) by removing roll pin
(40). Remove cotter pin (25), flat washer (24), and
two belleville washers (23).
6. Remove set screw (27) unscrew bell (22). Lift bell
(22) and stem (19). Unscrew stem connector (26)
from valve stem (6). Remove lockwasher (10),
cylinder (17), spacer (12), and gland bushing(14).
7. Remove adapter plate (2), upper diaphragm plate
(4), diaphragm (11). Remove and discard o-ring (8),
remove lower diaphragm plate (5), remove and
discard o-ring (7).
CAUTION: If the valve is equipped with a metal
diaphragm, the edges are very sharp. Exercise caution
to avoid lacerations.
Preparing Valve For Assembly
All parts should be cleaned and examined. Damaged
parts should be replaced.
Note: For all assembly lubrication requirements, follow
instructions for soft seated valves that meet the following
conditions:
• If you are working on a valve that was purchased
after 9/17/2018.
• If you are installing a repair kit for a valve that was
purchased after 9/17/2018, and a part number in
that repair kit has a model suffix of -SLFLK, -SFLK, or
-SLK.
New Loctite Instructions for valves that meet the above
conditions:
• Loctite is no longer required for wetted stem com-
ponent assembly. It can still be used, but its use will
make future stem disassembly more difficult.
For valves or parts that don’t meet the above condi- tions
use the following instructions:
For valves or parts that don’t meet the above conditions
use the following instructions:
Clean threads on the stem and on retainer with Loctite
primer 7649. Follow Loctite’s instructions for primer and
sealant. Install new soft seat onto retainer (or onto stem
when applicable on low flow versions). Apply Loctite
Sealant 2046 to threads and thread the retainer onto the
stem. Tighten until the screw threads run out. Allow to
cure.
Assembling the Valve
1-1/2”-3”
1. Lubricate o-ring and install into the groove in the
body (1) (not required with an elastomer diaphragm).
2. Lubricate o-ring (7) and install into the groove in the
lower diaphragm plate (5).
3. Install lower diaphragm plate (5) onto stem (6)
4. Install o-ring (8) onto lower diaphragm plate (5).
Install diaphragm (11) onto stem (6). Install upper
diaphragm plate (4) onto stem.
5. Install gland bushing (14) into guide bushing (18).
6. Install stem (6) into the body (1). Center diaphragm
onto body. [When using the ultra-thin Jorlon
diaphragm, install Gylon gasket centered over
diaphragm.]
7. Install adapter (2) onto the body (1). The adapter (2)
should engage the pilot diameter on the body (1)
and the drain slot should be over the inlet.
8. Install spacer (12) and cylinder (17) on to the stem
(6).
9. Install lock-washer (10) on to stem (not required with
an elastomer diaphragm).
10. Install stem connector (26) on to stem and tighten. If
elastomer diaphragm, tighten only ¼ turn and apply
Loctite No. 290 to the threads to lock the joint.
11. Install lift lever stem (19) into bell (22). Screw bell
(22) on to stem connector (26). Secure bell (22) with
CPSS (27).

-3-
12. Install two Belleville washers (23) and one flat
washer (24) on to lift lever stem (19). Secure with
cotter pin (25).
13. Install thrust washer (36) and needle bearing (35) on
to adjusting screw cap (21).
14. Align slots in spring guide (33) with spring housing
guides (32) and insert assembly into spring housing
(42). Place spring (9) into cylinder (17).
15. Install spring housing assembly (42) over spring (9)
and on to valve. Secure spring housing (42) with
twelve HHCS (15). Cross tighten to 200 in-lbs.
16. Install cam connector (41) on to lift lever stem (19)
and secure with roll pin (40).
17. If lift lever plate (29) is worn, remove screws (31) and
flip over, then reinstall screws.
18. Place adjusting block over cam connector (41) and
adjusting screw cap (21).
19. Install cam (30) in the orientation shown on the
“CLOSED POSITION” detail view with cam connector
(41) inside center slot of cam (30) and secure with
3/8” self locking pin (38).
20. Screw the two handles (43) into the adjusting block
(28). Turn the adjusting block clockwise to establish
a set point to seat the plug (6). Unscrew one of the
handles (43) from the adjusting block(28) and screw
it into the cam (30). Pull the handle (43) down and
toward you, then secure with the ¼” self locking pin
(39). Check to make sure the plug (6) has lifted and
is no longer seated. Reverse the process to reseat
the plug and replace the handle used for the cam
back into the adjusting block.
Troubleshooting
If You Experience Erratic Control:
• Regulator may be oversized. Oversizing causes
cycling, hunting, and reduces the rangeability of
the valve – make certain that your valve has been
correctly sized for your application conditions
• Valve seat may be defective - replace stem and/or
body.
• Valve plug may not be moving freely – inspect the
cylinder and spring housing.
Upstream Pressure Build-up or Inability to Maintain
Regulated Pressure.
• Inspect for jamming between cylinder and spring
housing.
• Diaphragm may have failed - replace if necessary.
• Piping may be blocked or undersized.
• Range spring may be set too high or may be broken
- inspect and reset or replace as necessary.
• The valve may be undersized for required flow -
make certain that the valve has been sized correctly.
Ordering Spare Parts
Use only genuine Steriflow Valve parts to keep your
valve in good working order. So that we can supply
the parts, which were designed for your valve, we must
know exactly which product you are using. The only
guarantee to getting the correct replacement parts is
to provide your Steriflow Representative with the valve
serial number. This number is located on the valve
identification tag. If the serial number is not available,
the parts needed for your valve might be determined
using the following information: Model Number, Valve
Body Size, Seat Material and Cv Rating, Spring Range
and Set Point, Trim Material, Part Name - Number and
Quantity.
NOTE: Any parts ordered without a valve serial number
that are found to be incorrect are subject to up to a
minimum 25% restock charge when returned.

Illustration and Parts List (1-1/2” - 3”)
3170 Wasson Road • Cincinnati, OH 45209 USA
Phone [phone] • Fax [phone]
sterifl[email protected] • www.steriflowvalve.com
Bulletin IM-MK95LL-0120
Closed Position Open Position
Item
No. Accessories Qty.
1 Body 1
2 Adapter Plate 1
3 Spring Housing 1
4 Upper Diaphragm Plate 1
5 Lower Diaphragm Plate 1
6 Stem/Plug 1
7 O-Ring #018 1
8 O-Ring #159 1
9 Range Spring 1
10 Lockwasher 5/8” 1
11 Diaphragm 1
12 Spacer 1
13 Support Washer (not shown) 2
14 Gland Bushing 1
15 HHCS 5/16-18 X 2” 12
16 Washer 3/8” 1
17 Cylinder 1
18 Guide Bushing 1
19 Lift Lever Stem 1
20 Adjusting Screw 1
21 Adjusting Screw Cap 1
22 Bell 1
23 B’ville Washer 2
24 Flat Washer 1
25 Cotter Pin 1
26 Stem Connector 1
27 Cup Point Set Screw 1
28 Adjusting Block 1
29 Lift Lever Plate 1
30 Cam 1
31 SHCS 1/4-20 X 3/4” 8
32 Spring Housing Guide 2
33 Spring Seat 1
34 Thread Seal 4
35 Needle Bearing 1
36 Thrust Washer 2
37 Pin-Knurled End 2
38 Self-Lock Pin 3/8” 1
39 Self-Lock Pin 3/16” 1
40 Roll Pin 1
41 Cam Connector 1
42 Spring Housing 1
43 Lift Lever Handle (removable) 2