cashco DA0 Instruction manual

INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM) IOM-DA0
02-20
I. DESCRIPTION AND SCOPE
Model DA0 is a pressure reducing regulator used to control downstream (outlet or P2) pressure. Sizes are
1/2" (DN15), 3/4" (DN20), 1" (DN25), 1-1/4" (DN32),1-1/2" (DN40), 2" (DN50), 3" (DN80) and 4" (DN100). Refer
to Technical Bulletin DA0-TB for design conditions and selection recommendations. (NOTE: This product was
formerly identified as a Model D0; a Model DA0 and D0 are one and the same product.)
This manual does not include instructions related to the various methods of pressure loading a Model DA0
main valve.
MODEL DA0
DIRECT-ACTING, PRESSURE LOADED
PRESSURE REDUCING REGULATOR
for STEAM APPLICATIONS
II. REFERENCES
Refer to Technical Bulletin DA0-TB and DAG-TB
for technical specifications for this regulator.
ABBREVIATIONS
CW – Clockwise
CCW – Counter Clockwise
ITA – Inner Trim Assembly
III. INSTALLATION
SECTION III
SECTION II
SECTION I
1. Regulator may be rotated around pipe axis 360
degrees. For ease of maintenance, the recom-
mended position is with the cover dome (25)
upwards.
2. Provide space below, above, and around regula-
tor for removal of parts during maintenance.
3. Install block valves and pressure gauges to pro-
vide means for adjustment, operation, bypass,
or removal of the regulator. A pipeline strainer
is recommended before inlet to remove typical
pipeline debris from entering valve and damaging
internal “soft goods”, primarily the dynamic seal.
4. Steam traps should be installed before and after
the regulator to provide proper drainage.
5. Install the regulator with the flow in the direction
of the arrow cast or stamped into the body.
6. For best performance, it is recommended that
the piping upstream and downstream of the
regulator be straight and free from any restric-
tions or bends, which can cause turbulence, for
a minimum length of approximately fifteen to
twenty pipe diameters.
7. Pipe size should be given special consideration,
particularly downstream of the regulator, to
ensure that the steam velocity does not exceed
industry or customer guidelines. Reference
DAG-TB, Table DAG-11 for recommendations
for applying external pressure sensing.
8. External sensing, uses an external control line.
This line is connected from the 1/4" (DN8) NPT
tap on the side of the pilot body to a pressure
tap downstream of the regulator. Use 1/4" or
3/8" (DN8 or 10) outer diameter tubing or 3/8"
(DN10) pipe having an inner diameter equivalent
to Schedule 40 pipe. For condensable vapors
(i.e. steam), slope the external sensing line
downward 2 to 5 degrees to the outlet piping
and prevent water pockets, which allows the
diaphragm chamber to always be self draining.
CAUTION
Installation of adequate overpressure protection is
recommended to protect the regulator from overpressure
and all downstream equipment from damage in the event
of regulator failure.
ISO Registered Company

IOM-DA0
2
IV. PRINCIPLE OF OPERATION
1. The pilot receives steam from the upstream tap-
ping in the side of the main regulator body and
passes it through to the cover dome. When a
loading pressure – PLoad – is applied into the top
of the cover dome, the outlet controlled pressure
– P2– will balance at approximately .90 – .98 of
the loading pressure - PL.(NOTE: Fluctuations
in P1– Inlet Pressure will cause a deviation in
P2 – Outlet Pressure due to inverse sympathetic
ratio effect.) See Section VIII.
V. STARTUP
1 Start with the block valves closed.
2. Adjust the loading system pressure control device
so that main regulator is trying to be controlled at 0
psig pressure. (For spring loaded pilots, relax the
range spring compression by turning the adjusting
screw CCW.)
3. If it is a “hot” piping system, and equipped with
a bypass valve, slowly open the bypass valve
to preheat the system piping and to allow slow
expansion of the piping. Closely monitor outlet
(downstream) pressure via gauge to ensure not
over-pressurizing. NOTE: If no bypass valve is
installed, extra caution should be used in starting
up a cold system; i.e. do everything slowly.
4. Crack open the outlet (downstream) block valve
to approximately 10% full open.
5. Slowly open the inlet (upstream) block valve to
about 25% open. Adjust the loading system pres-
sure control device setpoint pressure upwards
until the main valve is flowing. Observe the outlet
pressure gauge to ensure not over pressurizing.
6. Continue to slowly open the inlet (upstream) block
valve until fully open.
7. Continue to slowly open the outlet (downstream)
block valve, especially when the downstream pip-
ing system isn’t pressurized. If the outlet (down-
stream) pressure exceeds the desired pressure,
close the inlet block valve and go to Step 2. Close
bypass valve approximately 25%, and repeat
procedure.
8. When flow is established steady enough that the
outlet (downstream) block valve is fully open, begin
to slowly close the bypass valve if installed.
2. Movement occurs as pressure variations register
on the stop plate. The registering pressure is the
outlet, P2, or downstream pressure. The loading
pressure fluid opposes plug movement. As outlet
pressure drops, the loading pressure pushes the
stop plate down, opening the port; as outlet pres-
sure increases, the plug pushes up and the port
opening closes.
3. A loss of loading pressure while inlet pressure is
imposed will cause the regulator to fail close.
SECTION IV
SECTION V
CAUTION
DO NOT HYDROSTATIC TEST THROUGH AN INSTALLED
UNIT; ISOLATE REGULATOR FROM TEST. The "OUTLET
RATING" as printed on the nameplate is the recommended
“upper operating limit” for the sensing diaphragm. Higher
pressures could cause internal damage. In addition, note
on the nameplate that the Inlet and Outlet pressure and
temperature ratings are at different levels.
CAUTION
Installation of adequate overpressure protection is recom-
mended to protect the regulator from overpressure and
all downstream equipment from damage in the event of
regulator failure.
CAUTION
Do not walk away and leave a bypassed regulator
unattended!

IOM-DA0 3
9. Develop system flow to a level near its expected
normal rate, and reset the regulator set point by
adjusting the loading system pressure control
setpoint to the desired outlet pressure level.
SECTION VI
10. Reduce system flow to a minimum level and
observe pressure set point. Outlet pressure
will rise from the set point of Step 9 for a Model
DA0. The maximum rise in outlet pressure on
decreasing flow should not exceed the 10%. If
it does, consult factory.
VI. SHUTDOWN
1. Shutoff inlet block valve.
2. Shutoff auxiliary loading pressure source, if sup-
plied. For spring loaded pilots, relax the range
spring by turning the adjusting screw CCW until
adjusting screw is removed.
3. Allow sufficient time for the line pressure down-
stream of the inlet block valve to bleed down.
4. Shutoff the outlet block valve.
5. Relieve the trapped upstream and downstream
pressure and loading pressure.
6. The regulator may now be removed from the
pipeline or disassembled for inspection and pre-
ventative maintenance while in-line.
VII. MAINTENANCE
A. General: Item No. Part Description
7 ...................................................................................Nut
10 ......................................................................Stop Plate
13 ....................................................Guide Bearing/Piston
14 ...............................Lower and Upper Static Stem Seal
15 .......................................................... Cage O-ring Seal
16 ............................................................................ Wiper
17 ............................................................... Wiper Washer
19 ............................................................................. Cage
20 .............................................................................. Plug
21 ...................................................................... Seat Ring
27 ....................................................... Dynamic Side Seal
SECTION VII
1. The regulator may be serviced without
removing the regulator from pipeline. The
regulator is designed with quick-change trim
to simplify maintenance.
2. Record the nameplate information to req-
uisition repair parts for the regulator. The
information should include: size, Product
Code and Serial Number.
3. Refer to Section X for recommended repair
parts. Only use original equipment parts
supplied by Cashco for rebuilding or repair-
ing regulators.
4. Owner should refer to owner's procedures
for removal, handling, cleaning and disposal
of nonreusable parts, i.e. gaskets, etc.
5. The Inner Trim is removed and replaced in
the body ( 23) as an assemblage of parts.
The Inner Trim Assembly, hereinafter called
ITA, consists of the following parts:
WARNING
SYSTEM UNDER PRESSURE. Prior to performing any
maintenance, isolate the regulator from the system and
relieve all pressure. Failure to do so could result in
personal injury.
Figure 1: Dynamic Side Seals

IOM-DA0
4
the "pressed-in-place" lower guide bushing
(24) and the surface can not be marred.
B. Main Valve Disassembly:
1. Shut down system in accordance Section VI.
2. Disconnect the external piping line(s) con-
necting pilot to main regulator.
3. Though it is possible to disassemble the main
unit while installed in a pipeline, it is recom-
mended that maintenance be done in a shop
when possible. The descriptions hereafter will
assume shop disassembly. Remove regulator
from pipeline.
4. Place the body in a vise with the cover dome
(25) oriented upwards.
5. Loosen the flange bolts (11) and nuts (12)
uniformly and remove.
6. Place matchmarks on body (23) and cover
dome (25) flanges. Remove cover dome and
gasket (13).
7. Evenly loosen the three cage cap screws
(18) in single revolution increments. NOTE:
Regulator contains a lower spring (22); the
ITA should rise as the cage cap screws are
evenly backed out. A downwards holding force
should be applied to the top of the piston-guide
bearing (13) to prevent the ITA from popping
up as the last threads of the cage cap screws
are backed out.
8. Remove the ITA by pulling up on the plug
(20). Set ITA aside.
9. Remove spring (22) from within the body (23).
10. Remove cage o-ring seal (15).
11. Remove body (23) from vise. Clean all reusable
metal parts according to owner's procedures.
C. Disassembly of the ITA:
1. To disassemble the ITA, hold the lower part
of the plug (20) in a bench vise; Do not hold
on the machined surface in the plug's (20)
spindle area. NOTE: The spindle “slides” in
Figure 2: Assembled ITA,
2. Rotate diaphragm lock nut (7) CCW and re-
move.
3. Remove stop plate (10). Remove ITA from
vise.
4. From below the cage (19) pull the plug (20)
downwards out of the piston-guide bearing
(13) and out thru the bottom of the cage.
5. Remove the piston-guide bearing (13) from
the upper end of cage (19).
6. Examine the dynamic side seal (27) mecha-
nism to determine if significant leakage was
occurring. If the dynamic side seal shows signs
of significant leakage, determine if operating
conditions are exceeding pressure, pressure
drop, or temperature limits.
7. Remove top seal (14) and dynamic side seal
(27) and discard. NOTE: Special care should
be taken when using “tools” to remove the
components to ensure that no scratches are
imparted on to any portion of the piston-guide
bearing (13) groove.
8. Remove wiper seal (16)and wiper washer (17)
from within cage (19).
9. Remove lower stem seal (14) from plug (20).
10. Remove seat ring (21) from bottom of cage;
examine for signs of leakage. If seat ring
shows signs of significant leakage, determine
if operating conditions of pressure, pressure
drop, or temperature are exceeding limits.
WARNING
SYSTEM UNDER PRESSURE. Prior to performing any
maintenance, isolate the regulator from the system and
relieve all pressure. Failure to do so could result in
personal injury.

IOM-DA0 5
11. Clean all reusable metal parts according to
owner's procedures.
D. Inspection of Parts:
1. After inspection remove from the work area
and discard the old “soft goods” parts (i.e.
o-rings, seals, gaskets, etc.) after inspection.
These parts MUST be replaced with factory
supplied new parts.
2. Inspect the metal parts that will be reused. The
parts should be free of surface contaminants,
burrs, oxides, and scale. Rework and clean
parts as necessary. Surface conditions that
affect the regulator performance are stated
below; replace parts that can not be reworked
or cleaned.
3. QC Requirements:
a. Plug (20);
1. 16 rms finish on its seating surface
for tight shutoff.
2. No major defects on bottom guide
spindle.
b. Cage (19);
1. 16 rms finish on cylinder bore. No
“ledges” formed due to wear from
moving dynamic side seal (27) or
wiper seal (16).
c. Lower guide bushing (24) (non-replace-
able):
1. 16 rms finish in bore.
2. Max 0.015 inch (0.38 mm) clearance
between plug (20) spindle and lower
guide bushing (24).
4. Staging Material for Reassembly.
a. Inspect and clean parts, as necessary,
from the spare parts kit.
b. Lay out all the regulator parts and check
against the bill of material.
E. Reassembly of the ITA:
1. When replacing the wiper seal (16), the re-
placement wiper seal (16) is “pre-formed”.
It may, however, require re-forming. Under
normal circumstances, this step may not be
required. If needed, reform the wiper seal
(16) by pressing the temporary assembly of
parts into the cage (19) backwards as shown
in Figure 3. The wiper seal (16) is best left in
this position overnight (minimum of two (2)
hours) prior to final reassembly.
2. After re-forming the wiper seal, remove parts
(13, 16, 17) from cage (19) and disassemble
this temporary assembly.
Figure 3: Temporary Wiper Seal Assembly
Not supplied. Use any
bolt, two washers and
nut of same approximate
hole size.
17
19
16
13
3. Place wiper washer (17) into “cup” of wiper
seal (16). Holding these parts between thumb
and forefinger, insert into cage (19) at an ap-
proximate 45° angled approach with wiper
washer (17) on bottom, wiper seal (16) on
top with turned-down lip of wiper seal enter-
ing cage first. Rotate wiper seal and wiper
washer to a level position approximately half
way down into cage. Allow wiper washer to
rest on bottom of cage.
4. Stretch the corrugated, metal, piston ring
energizer of the dynamic seal (27) over the
lower circumference of piston-guide bearing
(13). Using thumbs, work the energizer into
the bearing groove.
5. Carefully stretch and slip one of the piston
ring seals over the lower circumference of
piston-guide bearing (13), taking care not to
“cut” the piston ring seal. Using thumbs, work
the piston ring seal into the groove of the
bearing. Repeat this procedure with a second
piston ring seal. NOTE: A piston ring assembly
(PRA) (27), consists of one metal corrugated
energizer and two piston ring seals
6. Position piston-guide bearing (13) over and
into upper end of cage (19) until the lower
piston ring seal touches the upper lip of the
cage. While gently applying force to press the
piston-guide bearing into the cage, simultane-
ously use fingers to lightly circumferentially
press the first piston ring seal inwards into
the piston-guide bearing groove until the first

IOM-DA0
6
piston ring seal “slips inside” the cage (19).
Repeat process for second piston ring seal .
7. Place properly oriented seat ring (21) onto its
shoulder at the lower end of cage (19).
8. Install new lower stem o-ring seal (14) into
groove of plug (20).
9. Insert plug (20) upwards through lower end
of cage (19) and through the center hole in
piston-guide bearing (13), wiper washer (17)
and wiper seal (16). Hold plug (20) and cage
(19) assembly together.
10. Place the second new upper stem o-ring seal
(14) into groove of guide bearing (13). Position
stop plate (10) on top of stem seal and guide
bearing.
11. Thread nut (10) over the upper end of plug
(20) and tighten hand tight.
12. Place this assembly of parts into vise, use the
"flats" on the lower part of the plug to secure
tight. Use torque value as follows:
into the body (23). To secure cap screws tight,
rotate cap screws CW in equal increments in
one-half revolution increments to pull down
the ITA evenly, taking care NOT TO “ANGLE”
the ITA in the BODY. Torque cap screws to
13-15 ft-lbs (17.6-20.3 N-m).
6. Install new gasket (37) onto body (23) flange.
7. Aligning matchmarks and flange bolt holes,
place cover dome (25) onto body (23).
8. Install all flange bolts (11) and nuts (12) with
nameplate (99) located under one bolt head..
9. Tighten the body bolting (11,12) evenly in
an alternating cross pattern in one revolution
increments to the following torque values:
G. Pressure Testing:
1. If a hydrostatic pressure test is performed,
pressure must be applied to all three of cover
dome (25), inlet and outlet of body at the same
level.
DO NOT HYDROSTATICALLY TEST WITH-
OUT COVER DOME PRESSURIZED. NOT
ADHERING WILL DO PHYSICAL DAMAGE
TO INTERNALS THAT COULD RENDER
THE UNIT INOPERABLE.
Body Size
in (DN)
Torque Value
Ft-lbs (N-m)
1/2" - 1" (15 - 25) 60 - 70 (81 - 95)
1 1/4" - 2" (32 - 50) 120 - 130 (163 - 176)
2 1/2" - 4" (65 - 100) 110 - 120 (149 - 163)
13. This completes ITA reassembly.
F. Main Reassembly:
1. Place body (23) in a vise.
2. Lower spring (22) into the body (23) and
center around the bushing.
3. Position the cage o-ring seal (15) down in
the body groove.
4. With the ITA held manually in the closed posi-
tion, carefully insert ITA into body (23). NOTE:
Lower spring (22) must be compressed to al-
low the cap crews (18) to engage the threads
in the body.
5. Properly align all three cage bolt holes with
holes in the body. There is only one circum-
ferential location possible for this alignment.
Use hand to apply downward force to the top
of the cage (19) until the ITA is lowered suf-
ficiently to engage the cage cap screws (18)
Body Size
in (Dn)
Torque Value
Ft-lbs (N-m)
1/2" - 2" (15 - 50) 30 - 35 (41 - 47)
2 1/2" - 4" (65 - 100) 45 - 50 (61 - 69)
Figure 4: Location of Auxiliary Ports

IOM-DA0 7
2. Inboard Leakage Test.
a. Release all loading pressure in cover
dome.
b. Pressurize inlet to 30 psig (2.1 Barg) with
air, GN2.
c. Tube outlet to a beaker of water to observe
number of escaping gas bubbles.
Inboard leakage path may be via plug/seat or
dynamic side seal.
3. Pressure Containment Test.
a. Pressurize inlet to 200 psig (13.8 Barg)
and outlet and cover dome to 150 psig
(10.3 Barg) with air or GN2.
b. Spray liquid lead detector and check all
external leak points; i.e. plugged connec-
tions, and flange bolting.
4. Excessive leakage will require disassembly,
examination of sealing elements, correction
of problem, reassembly and retesting.

IOM-DA0
8
SECTION VIII
Figure 8: Loading Pressure Formula
LOADING PRESSURE FOR
MODEL DA0
APPLIED PRESSURES
PLOAD = ISR Effect + Lower Piston Spring +Lower Piston Spring + Body Size
Compression Effect Spring Preload Orientation Effect
PLoad = P2+ [ISR x (P1– P2)] + CVReq'd x ∆PPiston Spr. + LVPS + S/OFactor
CVMax
ISR FACTOR
BODY SIZE
in (DN) ISR – %
1/2" - 1" (15 - 25) 3.0
1 1/4" - 1 1/2" (32 - 40) 4.0
2" (50) 2.0
2 1/2" - 4" (65 - 100) 5.4
PISTON SPRING
LOWER PISTON
SPRING RANGE
psig (Barg)
∆P Piston
Spring
psig (Barg)
LVPS
psig
(Barg)
none (none) 0 (0) 0 (0)
2 - 5 (.14 - .34) 3 (.21) 2 (.14)
1 - 2 (.07 - .14) 1 (.07) 1 (.07)
4 - 10 (.28 - 6.9) 6 (.41) 4 (.28)
SIZE / ORIENTATION – S/O Factor
Body Size
in (DN)
Orientation
Cover Dome
on Top
Cover Dome
on Bottom
1/2" - 1" (15 - 25) 1 -1
1 1/4" - 1 1/2" (32 - 40) 2 -2
2" (50) 2.5 -2.5
2 1/2" - 3" (65 - 80) 3 -3
4" (100) 4-4
VIII. PRESSURE LOADING
1. Loading pressure can be supplied using various
schemes. Please reference LOADING SYSTEMS
on web-site for the schematics of these various
schemes, including:
• pressure unloading using BPV
• pressure loading using PRV
• pressure loading using pilot
• pressure loading using I/P transducer
2. The Model DA0 exhibits a deviation in outlet
controlled pressure when the inlet pressure var-
ies; this “effect” is identified as ISR – Inverse
Sympathetic Ratio. Its relative pressure effect
can be calculated from the following equation.

IOM-DA0 9
SECTION IX
IX. TROUBLE SHOOTING GUIDE
When trouble shooting this regulator there are many possibilities as to what may be causing problems. Many times, the regulator
itself is not defective, but one or more of the accessories may be. Sometimes the process may be causing difficulties.
The key to efficient trouble shooting is information and communication. The customer should try to be as precise as possible
in their explanation of the problem, as well as their understanding of the application and operating conditions.
It is imperative the following information be provided by the customer:
• Fluid (with fluid properties) • Range of outlet pressure
• Range of flow rate • Range of fluid temperature
• Range of inlet pressure • Range of ambient temperature
Pressure readings should be taken at every location where pressure plays a role - i.e., regulator inlet (as close as possible to
inlet port), regulator outlet (as close as possible to outlet port), etc.
Following are some of the more common complaints along with possible causes and remedies.
1. Erratic regulation, instability or hunting.
Possible Causes Remedies
A. Sticking of internal parts. A. Remove internals, clean, and if necessary, replace.
B. Oversized regulator. B. Check actual flow conditions; resize regulator for minimum and maxi-
mum flow; if necessary, replace with smaller size regulator.
2. Downstream pressure will not reach desired setting.
Possible Causes Remedies
A. Supply pressure is down (confirm on pressure
gauge.
A. Increase supply pressure.
B. Undersized regulator. B. Check actual flow conditions; resize regulator for minimum and maxi-
mum flow; if necessary, replace with larger regulator.
C. Pressure loading system pressure restricted. C1. Clean restriction or bleed orifices.
C2. Clean filter(s).
C3. Clean loading pressure control device.
D. Faulty loading pressure control device. D. Replace/repair loading pressure control device.
6. Leakage at body/cover flange.
Possible Causes Remedies
A. Body bolts not torqued properly. A. Torque to proper value (see Section VII, F-11).
B. Pressures may be too high. B. Consult factory.
7. Leakage across seat.
Possible Causes Remedies
A. Contamination (debris) in regulator. A. Remove internals, clean, & replace sealing and seating elements. *
B. Oversized regulator; valve plug operates
directly next to seat.
B. Check actual flow conditions; resize regulator for minimum and maxi-
mum flow; if necessary, replace with smaller size regulator.
* Seat leakage may be diagnosed when a failure of the dynamic side seal has occurred. Inspect both potential internal leak paths.

IOM-DA0
10
SECTION X
NEW REPLACEMENT UNIT:
Contact your local Cashco, Inc., Sales Represen-
tative with the Serial Number and Product code.
With this information they can provide a quotation
for a new unit including a complete description,
price and availability.
–7–
X. ORDERING INFORMATION
NEW REPLACEMENT UNIT vs PARTS "KIT" FOR FIELD REPAIR
To obtain a quotation or place an order, please retrieve the Serial Number and Product Code that was stamped on
the metal name plate and attached to the unit. This information can also be found on the Bill of Material ("BOM"),
a parts list that was provided when unit was originally shipped. (Serial Number typically 6 digits). Product Code
typical format as follows: (last digit is alpha character that reflects revision level for the product).
PARTS "KIT" for FIELD REPAIR:
Contact your local Cashco, Inc., Sales Represen-
tative with the Serial Number and Product code.
Identify the parts and the quantity required to repair
the unit from the "BOM" sheet that was provided
when unit was originally shipped.
NOTE: Those part numbers that have a quantity indicated
under "Spare Parts" in column "A” reflect minimum
parts required for inspection and rebuild, - "Soft
Goods Kit". Those in column “B” include minimum
trim replacement parts needed plus those "Soft
Goods" parts from column "A".
If the "BOM" is not available, refer to the cross-
sectional drawings included in this manual for part
identification and selection.
A Local Sales Representative will provide quotation
for appropriate Kit Number, Price and Availability.
CAUTION
Do not attempt to alter the original construction of any
unit without assistance and approval from the factory.
All purposed changes will require a new name plate
with appropriate ratings and new product code to
accommodate the recommended part(s) changes.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be
construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to
modify or improve the designs or specifications of such product at any time without notice.
Cashco, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any
Cashco, Inc. product remains solely with the purchaser.

IOM-DA0 11
Item No. Description
7 Nut
10 Stop Plate
11 Cap Screws
12 Nuts
13 Guide Bearing
14 * Seal
15 * Cage Seal
16 * Wiper Seal
17 Washer
18 Cage Cap Screws
19 Cage
Item No. Description
20 * Plug
21 * Seat
22 Spring
23 Body
24 Body Bushing
25 Cover Dome
27 * Dynamic Seal (see Figure 1)
37 * Gasket
90 Washer (on 1/2"- 2" sizes below No.7)
* Recommended Repair Parts.
Figure 5

IOM-DA0
12
Cashco, Inc. declares that the products listed in the table below has been found to comply with the Essential
Health and Safety Requirements relating to the design and construction of products intended for use in potentially
explosive atmospheres given in Annex II of the ATEX Directive 2014/34/EU. Compliance with the Essential
Health and Safety Requirements has been assured by compliance with EN ISO 80079-36:2016 and EN ISO
80079-37:2016. The product will be marked as follows:
II 2 G
Ex h IIB T6... T1 Gb
1000ATEXR1 X
The ‘X’ placed after the technical file number indicates that the product is subject to specific conditions of use as
follows:
1. The maximum surface temperature depends entirely on the operating conditions and not the equipment
itself. The combination of the maximum ambient and the maximum process medium temperature shall
be used to determine the maximum surface temperature and corresponding temperature classification,
considering the safety margins described prescribed in EN ISO 80079-36:2016, Clause 8.2. Additionally, the
system designer and users must take precautions to prevent rapid system pressurization which may raise
the surface temperature of system components and tubing due to adiabatic compression of the system gas.
Furthermore, the Joule-Thomson effect may cause process gases to rise in temperature as they expand
going through a regulator. This could raise the external surface temperature of the regulator body and
the downstream piping creating a potential source of ignition. Whether the Joule-Thomson effect leads to
heating or cooling of the process gas depends on the process gas and the inlet and outlet pressures. The
system designer is responsible for determining whether the process gas temperature may raise under any
operating conditions.
2. Where the process medium is a liquid or semi-solid material with a surface resistance in excess of 1GΩ,
special precautions shall be taken to ensure the process does not generate electrostatic discharge.
3. Special consideration shall be made regarding the filtration of the process medium if there is a potential for
the process medium to contain solid particles. Where particles are present, the process flow shall be <1m/s
(<3.3 ft/s) in order to prevent friction between the process medium and internal surfaces.
4. Effective earthing (grounding) of the product shall be ensured during installation.
5. The valve body/housing shall be regularly cleaned to prevent build up of dust deposits.
6. Regulators must be ordered with the non-relieving option (instead of the self-relieving option) if the process
gas they are to be used with is hazardous (flammable, toxic, etc.). The self-relieving option vents process
gas through the regulator cap directly into the atmosphere while the non-relieving option does not. Using
regulators with the self-relieving option in a flammable gas system could create an explosive atmosphere in
the vicinity of the regulator.
7. Tied diaphragm regulators with outlet ranges greater than 7 barg (100 psig) should be preset to minimize the
risk that improper operation might lead to an outboard leak and a potentially explosive atmosphere.
8. All equipment must only be fitted with manufacturer’s original spare parts.
9. Ensure that only non-sparking tools are used, as per EN 1127-1, Annex A.
ATEX 2014/34/EU: Explosive Atmospheres and Cashco Inc. Products

IOM-DA0 13
Cashco, Inc.
P.O. Box 6
Ellsworth, KS 67439-0006
PH [phone]
Fax. # [phone]
www.cashco.com
email: [email protected]
Printed in U.S.A. DA0-IOM
Cashco do Brasil, Ltda.
Al.Venus, 340
Indaiatuba - Sao Paulo, Brazil
PH [phone]
Fax. No.
www.cashco.com
email: [email protected]
Cashco GmbH
Handwerkerstrasse 15
15366 Hoppegarten, Germany
PH [phone]
Fax. No. [phone]
www.cashco.com
email: [email protected]
REGULATORS
PRODUCT
31-B, 31-N
1164, 1164(OPT-45)
1171, 1171(OPT-45), 1171(CRYO)
2171, 2171(OPT-45), 2171(CRYO), 3171
1465, 3381, 3381(OPT-45), 3381(OPT-40)
4381, 4381(OPT-37), 4381(CRYO), 4381(OPT-45), 5381
MPRV-H, MPRV-L
PBE, PBE-L, PBE-H
CA-1, CA-2
CA1, SA1, CA4, SA4, CA5, SA5
DA2, DA4, DA5, DA6, DA8
DA0, DA1, DAP, SAP
SLR-1, SLR-2, PTR-1
ALR-1, ULR-1, PGR-1
BQ, BQ(OPT-45), BQ(CRYO)
123, 123(CRYO), 123(OPT-45), 123(OPT-46G)
123-1+6, 123-1+6(OPT-45), 123-1+6(OPT-46G), 123-1+6+S, 123-1+6+S(OPT-40)
1000HP, 1000HP(OPT-37), 1000HP(OPT-45), 1000HP(OPT-45G), 1000HP(CRYO)
1000HP-1+6, 1000HP-1+8, 1000LP, 1000LP(OPT-45), 1000LP(OPT-46G)
6987
8310HP, 8310HP-1+6, 8310HP-1+8, 8310LP, 8311HP, 8311LP
345, 345(OPT-45)
BA1/BL1, PA1/PL1
C-BPV, C-PRV, C-CS
D, D(CRYO), D(OPT-37), D(OPT-20), D(OPT-45)
DL, DL(LCC), DL(OPT-45)
BR, BR(CRYO)
HP, HP(LCC), HP(OPT-45), HP(OPT46G), HP-1+6+S(OPT-40), HP-1+6+S
P1, P2, P3, P4, P5, P7
B2, B7
POSR-1, POSR-2
5200P, 5300P
135
NW-PL, NW-SO
CG-PILOT
FG1
CONTROL
VALVES
RANGER, 987, PREMIER
964, 521, 988, 988-MB, 989
2296/2296HF
SCV-30, SCV-S
FL800/FL200
TANK
BLANKETING
8700, 8910, 8920, 8930, 8940
2100, 2199
3100, 3200, 3300, 3400, 3500, 3600, 3700
1078, 1088, 1100, 1049
5100, 5200, 5400 ,5500
4100, 4200, 4300, 4400, 4500, 4600
MISC 764P/PD, 764-37, 764T