signed to meet the rigid specications for sterile process
and clean utility control valves. This valve series is
suitable for a wide variety of applications in the, biopharmaceutical, Parenteral, cosmetic, dairy and food
and beverage industries.
The Mark 978 meets ASME BPE 2009 guidelines, and
is ideally suited for a wide range of owing media in
both the clean utility and process areas of sanitary and
aseptic systems.
High rangeability, true characterized trim, high capacities, superior temperature and pressure ratings, facilitated by a superior diaphragm, make the MK978 the
sanitary control valve for sterile process, buffer, WFI
and acid metering, and clean gas and steam services.
CRN Registration Number Available
Sanitary Valves Mark 978JD Sanitary Control Valves
Whether the need is to control pressure, temperature,
ow, pH, or another variable, the MK978 is the right
valve for your process.
Features
• Specialized design of diaphragm seal and components allows ultra-high cycle life and lifetime
diaphragm warranty
• Wetted parts made of 100% ASTM A479 316L
Stainless Steel barstock
• Maintenance-friendly – easy to perform sanitary
maintenance with simple disassembly and reassembly
• Steel, baked corrosion resistant coated multi-spring
actuators to meet a wide range of differential pressure requirements while providing excellent corrosion resistance during washdown
available Finishes
Body
• Standard: 20 Ra mechanical nish on
internal wetted surfaces (0,5 µm); machine
nish on exterior (63 RMS), and electropol-
ished inside and out
• Optional: 20 Ra mechanical nish on
external surfaces (0,5 µm); 8 Ra nish on
internal or external surfaces (0,2 µm)
Stem
• Standard: 20 Ra mechanical nish and
electropolish (0,5 µm)
• Optional: 8 Ra mechanical nish (0,2 µm)
applications
A wide variety of applications exist for the MK978
in the pharmaceutical, biotech, health care, and
food & beverage and other industries including:
Note: 1-1/2", 2" & 3" require positioner supplied by Steriow or customer. 3" actuator is bench set @ 11 - 30 psi
* 1/2" - 1" may be sold with I/P instead of positioners
** 1/2" – 2" with postioner ATO actuator is bench set @ 6-30 psi/ ATC actuator is bench set @ 3-15 psi.
Valve Cv
Actuator
Size
ATO 3-15
ATO 6-30 or with
positioner @ 40 psi
-2-
ATC 3-15 or with
positioner @ 20 psi
ATC 6-30 @ 40 psi
Page 3
Mark 978 Sanitary Globe-Style Control ValVeS - Jorlon DiaphraGM Seal
mark 978e Jorlon Diaphragm seal (1/2" - 1" anglestyle; 1" inline style)
NEW Bi-direction ow capability.
Valve can be installed with inlet on side
or bottom. Self draining when valve is
installed with inlet on side
and valve in upright
position as shown.
Corrosion resistant SST
yoke assembly suitable for
washdown
Corrosion resistant coating
with SST fasteners
Namur yoke permits
easy mounting of a
variety of positioners
FDA/USP Class VI Jorlon diaphragm
resistant to aggressive chemicals,
suitable for continuous steam service;
Lifetime Warranty
Solid 316L barstock construction offers
excellent chemical resistance, ensures
consistent material integrity and surface
nish
Optimal ow inlet geometry for true
ow characteristics.
Contoured plug and orice design to
provide true equal percentage or linear
ow characteristic for improved turndown
secondary stem seal
Bolted bonnet provides
enhanced strength and
safety over clamped bonnet
speciFication
Stainless steel sanitary control valve shall be made from ASTM A479 316L barstock material, which includes
body and all wetted metal parts. Control valve with the stem sealed by FDA approved and USP Class VI certied Jorlon diaphragm with lifetime warranty. The valve stem shall be supported by a one piece, SS NAMUR
Yoke with two extended PEEKTM Guide bushings to provide structural rigidity and true guiding in any installation
orientation. Guiding of valve stem/plug shall be outside of the wetted process areas of valve above diaphragm.
Control valve shall have secondary stem seal, and extended guide bushing to provide additional support for
multiple installation orientations. Valve shall be self draining in any orientation.
-3-
Page 4
Mark 978 Sanitary Globe-Style Control ValVeS - Jorlon DiaphraGM Seal
Corrosion resistant SST
yoke assembly suitable for
washdown
Jorlon Diaphragm seal (1-1/2" – 2")
Corrosion resistant coating
with SST fasteners
Namur yoke permits
easy mounting of a
variety of positioners
Telltale weephole between
primary diaphragm and secondary
stem seal per ASME BPE 2009
FDA/USP Class VI Jorlon diaphragm
resistant to aggressive chemicals,
suitable for continuous steam service;
Lifetime Warranty
Solid 316L barstock construction offers
excellent chemical resistance, ensures
consistent material integrity and surface
nish
Optimal ow inlet geometry for true ow characteristics.
Self draining geometry in either vertical or horizontal
orientation allows installation exibility
FDA/USP Class VI
secondary stem seal
Bolted bonnet provides
enhanced strength and
safety over clamped bonnet
Contoured plug design for true equal
percentage or linear ow characteristic
throughout entire stroke length
speciFication
Stainless steel sanitary control valve shall be made from ASTM A479 316L barstock material, which includes
body and all wetted metal parts. Control valve with the stem sealed by FDA approved and USP Class VI certied Jorlon diaphragm with lifetime warranty. The valve stem shall be supported by a one piece, SS NAMUR
Yoke to provide structural rigidity in any installation orientation. Guiding of valve stem/plug shall be outside of
the wetted process areas of valve above diaphragm. Control valve shall have secondary stem seal, and extended guide bushing to provide additional support for multiple installation orientations. Valve shall be self draining
in any orientation.
-4-
Page 5
Mark 978 Sanitary Globe-Style Control ValVeS - Jorlon DiaphraGM Seal
Optimized spring
conguration for
maximum pressure
drop in compact size
Extended PEEK guide
bushings ensures
smooth, stable movement throughout entire
stroke length
Jorlon Diaphragm seal (3")
Corrosion resistant
coating with SST
fasteners
SST Namur yoke permits easy
mounting of a variety of positioners
FDA/USP Class VI secondary stem seal
Telltale weephole between primary
diaphragm and secondary stem seal
per ASME BPE 2009
FDA/USP Class VI Jorlon diaphragm
Unique body design is
compact and ultra-lightweight
simplifying installation
Optimized ow geometry to
accommodate high hydraulic
forces of large ows
resistant to aggressive chemicals,
suitable for continuous steam service;
Lifetime Warranty
100% 316L construction for body
and trim which ensures process
compatibility
Hard seats for ANSI Class III shut-off
Soft seats to ANSI Class VI
Contoured plug design for true equal
percentage or linear ow characteristic
throughout entire stroke length
speciFication
Stainless steel sanitary control valve shall be made from ASTM SA479 316L material, which includes body and
all wetted metal parts. Control valve with the stem sealed by FDA approved and USP Class VI certied Jorlon diaphragm with lifetime warranty. The valve stem shall be supported by a one piece, SS NAMUR Yoke to
provide structural rigidity in any installation orientation. Guiding of valve stem/plug shall be outside of the wetted
process areas of valve above diaphragm. Control valve shall have secondary stem seal, and extended guide
bushing to provide additional support for multiple installation orientations. Valve shall be self draining when
installed with inlet vertical and below valve assembly.
-5-
Page 6
Mark 978 Sanitary Globe-Style Control ValVeS - Jorlon DiaphraGM Seal
mark 978e inline (1")
New INLINE design allows
process design exibility. Process
designers are no longer constrained
by angle valve process tubing. Fully
drainable, no hold up when installed
as shown
Corrosion resistant
coating with SST
fasteners
Namur yoke permits easy
mounting of positioners
Telltale weephole between primary diaphragm and
secondary stem seal per ASME BPE 2009
100% 316L construction for
body and trim which ensures
process compatibility
Bolted bonnet provides
enhanced strength and safety
over clamped bonnet
Unique body design is compact and ultra-lightweight simplifying installation
mark 978 inline (1-1/2" - 2")
Namur yoke permits
easy mounting of a
variety of positioners
FDA/USP Class VI Jorlon diaphragm
– resistant to aggressive process
utilities, suitable for continuous
steam service, Lifetime Warranty
100% 316L construction for
body and trim which ensures
process compatibility
-6-
Page 7
Mark 978 Sanitary Globe-Style Control ValVeS - Jorlon DiaphraGM Seal
Dimensions
D
B
C
A
12.87
(326,9)
*
9.50
(241,3)
5.80
(147,3)
1.30
(33,0)
1/2" – 1" angle style
Installation and Drainability (for both valves):
• Valve is bi-directional, ow can enter either connection
• When valve is open, there is no hold up volume
• * For gravity drainage from inlet to outlet, install as shown above.
Dimensions 1/2" - 1" angle style
inchesmetric
Valve
Size
1/2"2.0811.94 1.91
3/4"2.0811.94 1.91
1"2.0811.94 1.91
ABCD
Dimensions
Weight
Lbs
9.50 (35M)27 (35M)
12.50 (55M) 42 (55M)
9.50 (35M)27 (35M)
12.50 (55M) 42 (55M)
9.50 (35M)27 (35M)
12.50 (55M) 42 (55M)
Valve
Size
DN155330349
DN205330349
DN255330349
-7-
ABCD
1" valve size
Dimensions
*
Weight
Kgs
241 (35M)12 (35M)
318 (55M)19 (55M)
241 (35M)12 (35M)
318 (55M)19 (55M)
241 (35M)12 (35M)
318 (55M)19 (55M)
Page 8
Mark 978 Sanitary Globe-Style Control ValVeS - Jorlon DiaphraGM Seal
Dimensions
Flow
Inlet
D
B
Outlet
B
Outlet
D
C
C
A
A
Inlet
Flow
1-1/2" – 2" valve sizes3" valve size
Installation Orientation and Drainability:
• Valve has not hold-up when installed as shown above, but must be drained below inlet.
• 1-1/2" - 2" valves will gravity drain from inlet to outlet, when installed with inlet horizontal (outlet facing down)
inchesmetric
Valve
Size
1-1/2"3.08 15.003.30
2"3.0815.00 3.30
3"3.5915.14.215.00 (85M) 59 (85M)
ABCD
Dimensions
Weight
Lbs
12.50 (55M) 47 (55M)
15.00 (85M) 57 (85M)
12.50 (55M) 47 (55M)
15.00 (85M) 57 (85M)
Valve
Size
DN407838184
DN507838184
DN8091384107381 (85M)27 (85M)
Based on US tri-clamp ends. Consult factory for DIN and ISO tri-clamp
end dimensions
GMK16IQ-S DIR / REV 4-20 (HART
HMK16IQ - B DIR / REV 4-20 (not HART
J
MK16IQ - FF DIR / REV 4-20
(Foundation Fieldbus
TM
®
)
®
)
)
Documentation
A Certicate of Compliance to material (with heat number and MTR's for body and ferule), surface nish and
FDA USP Class VI is provided for each line item on all Steriow orders at no charge. The following additional
documentation is available from our factory upon request at time of ordering:
• Traceable Material Certicates for all wetted parts
Steriflow Valve reserves the right to make revisions to its product, specifications, literature and related information without notice. Please visit our
website at www.steriflowvalve.com for the latest information on our products.
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