FOR
FAIRCHILD MODEL 80D
GEMERAL INFORMATION
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
PNEUMATIC MULTISTAGE PRESSURE REGULATOR
The Mairckild Model D000 multi-stage precision pneumatic pres-
sJre regulator is a two-stage, pilot operated regulator. The
Mode! 800 combines tha ultra high pracision characteristics of
an instrument regulator with the sigh flow capacity of the pro-
cass egulator thereby producing a singls regulator with the
most destrable perlormance characteristics of the instrument
and process reguators. Tie basic force balance system
coupled with gral control produces an extremely sensitive regy-
letor which responds to the smallest change in output requira-
ments.
Specifications
Model 800
FOw CAPaciby iu. eines. 14 SCFM (23.8 mY/HR) 100 psig
(7.0 BAR] (700kPa) supply; 20 psig [1.5 BAR] (150 kPa) set
Exhaust capacity ........... e... 2.5 SCFM (4.25 my/HR)
(Downstream prassiire 5 psig [35 BAR] (35 kPa) above sat
pressure)
Pressure change uncer ticw eonditios
set pressure 10 psig '0.7 BAR] {70 kPa) supply 100
psig [7.0 BAR] (700 kPa) ................... less than 91 psig
[007 BAR] (.7 «Pay W.C. from
dead end service to 1) SCEM 17 mYHR)
Maximum supply pressure ............—. 150 psig [10.0 BAA]
(1000 kPa} for 20 psig (140 kPa) range
250 psig [17.0 BAR] (1700 kPa) for £0-100 psig
[4.2-1U.C AR) (420-700 kPa) ranges
Maximum oulpul pressure... 150 psig [1.0 BARA] [1000 KPa)
Fressure change due to .......... less than 2 psig [.01< DAR]
supply pressure condition (1.4 kPa) for 1C0 psig
0 BAR) (700 <a; range
Air Cursur lier ree less than 0,1 SCFM (17 MPHR)
Ambient temperate lifts nn, 40°F to +200°F
{-d0°C to 95,37 C!
PRINCIPLES OF OPERATION
ARA SPS
With supply pressure turned of and the adjusting
krob turned completely out, allowing lhe rance spring
to be relaxed, the supply and relief valves arz seatec
because of the upward force cl the supply valve spring
on the valve assembly, When supaly air is introducec
to the inlet port, air flows through tha stainless stee
filler ana sapphire orifice fo the tes of tha power stage
diaphragm assembly, througa the nozzle, and te the
downstream side of the requlatur. The action of the
cantrol bias spring furnishes the differential pressure
across Me nozzle to allow flow.
FL APPE PS, — RANGE SPAM
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When the knob af the Model BCD is adjusted lo a
Specific set point the range spring exerts à force
against the pilot stage diaphragm. The resultant pres-
sure Po - K, where Pois ourput pressure and K 1s the
spring constant. This concition is achieved only when
Culput pressure reaches the desired set point. Lntil
then, the ‘orca moves tha flapper against the pilot
stage nozzle, reducing the nozzle flow, The nozzie
back preseure increases and acts on the power slayge
digphragm. This farce acis against te control bias
Spang force, the supply valve spring force, and the
force cue to downstream pressure acing on the hot-
tom ofthe control diaphragm, driving the power stage
diaphragm assembly downward, opening the supply
valve, and allowingairtof ow to he outlet pont. Down-
stream (outlet) pressure is transmitted to the pilot
chamber, exerting pressure on the underside of the
pilot diaphragm. The increase in pressure nn the pi ot
diaphragm causes the diaphragm to move upward
against the range spring force. This force moves the
pilot diaphragm assembly upward, allowing the flappar
to move upward and venting the nozzle to down-
stream. The flapper comes 10 a position 50 as to man-
tain a nozzle back pressure which acts downward on
the power stage diaphragm, balancing the upward
force of the downstream pressure on the control
diaphragm and the force of the control as and
supply valve sprirgs. Downstream air pressure acts
on the bottom of the power stage diaphragm assem-
bly, movingthe assembly upwa‘d, allowing the supaly
valve to throttle and maintaining output pressure,
When sel pont is reached, the force acting on the
bottom of the power stage diaphragm assembly is in
balarce wita the force acting gn the top of the assem-
Bly. 11 downsiream pressure rises abuve set point, the
increased pressurs is transmitted through the channel
to the pile: chamber, and exerts pressure on the
underside of the pilot diaphragm. As the pilot diaph-
ragm meves upward, supply air is vented through the
flapper nozzle, reducing pressure on the top of the
power stage diaphragm assembly to a lower value
Downstream pressure acts on the underside of the
power stage diaphragm assembly. The increased
FLARE R, MAPPE og FUE
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pressure, assisted by the control blas spriig, forces
the power stage diaphragm assembly to move upward,
allowing the relief seal to move away from the relief
valve, Exhaust takes place thorugh the vent in the
spacer ring.
INSTALLATION
Cleón all pipe lines to removz dirt and scale before
installation 1s made. Apply minimum amount of pipe
compounc to mele threads of air ling only, Start with
third thread back and work away from end of line to
ee ‘nn avoid possibility of getting compound into regulator.
ft] Install regulator in air ling; body is fitted with a 6" NPT
mt Î let and Зе! ti F lalor D
! == — or inlet and cullet connections. Fegulalor can be
ía Sinai el | mounted in any posiiton without afecting its opera-
| | rom "5" Фет | | tion, [niet and outlet connections are labeled (loo< for
| NN | т Г arrows denoting direction of flow on underside of
zt | ла wren | il - | unit) and should be tightened securaly. Avoid under-
| CA Ton (2-2 | | sized fittings that will limit flow through tha regulator
| I tir т == and cause pressure drop downstream. NOTE; The
| TAO o | ae | ema |: y Lar Model 80D must be used on oil free air. Thé use of a
N | ma = | ве De hiter to remove cirt and entrained liquid inthe air line
5) its T E ahead of the requlator is required for correct perform-
e” EM grice, | Tamair line lubricator is used, it must be located
- : downstream beyond the regulator to avoid interfer-
4" NFT inlet and.oullet ence with the regulator perfarmancs
ADJUSTMENTS
Mo Field adjustments ae required.
Full range of pressure 15 secured gver 414 turns of the adjusting screw
OPERATION
Relieve pressure on range spring before putting the
BOC into service for the first time. To operate turn the
adjusting screw slowly in a clockwise direction until
required cownstream pressure is obtainec, Turnagin
this direction, the screw comoresses the range soning
causing increased output pressure. For decreased
autput pressure, turn the screw counterclockwise.
OPTIONS STANDARD UNIT
ЭТО Е 5
Knob Assembly EB-1142-1 EO-11d2.1
Spacer Ring ЕВ-16582-1 EB-16682-2 EO-15682-1
Body & Valve Assembly EB-13580-1 EB-13680.1 ЕВ-13680-1
Body Assembly EB-9531-1
Screw EB-8159-14
Ми! EB-1120
OPTIONS
STD T
Knoo Assembly CE-1143-1
Cap EB-11029
SOW EB-8159-14
Mu EB-1120
OPTIONS LARGE PORT UNIT
STD E 3
Knob Assembly EB-1142-1
acer Ring E2-16682-2
Foay & Valve Assembly Sec Table
Screw ЕВ-8159-14
Ur EB-1120
OPTIONS
STD F P
“noo Assembly EB-1142-1
Cap EB-11029
SCrew EH-8153-14
Nut ER-1120
Barnet Assembly EB-9536-4 EB-3535-6
All Ranges
E Body & Valve — |
Assembly Body Port
| ES-16616-5 “5515-1 i NPT
E5-16616-6 16515-2 Ya MF |
EB-16616-7 5015-39 à BSPT
ЕВ-1661 6-8 16615-4 wBIPT |
и
ЕВ-1142-7
EB-16682-
EE-15680-2
EB-9531-5
See Table
index Part No. Description
1 =B-1142-1 Knob Assambly
TA EB-110729 Cap Mut
18 EB-8159-14 Screw
2 EB-9536-4 Sonnal Assemzly
3 ЕВ-11020 Spring Seat
DA EB-12191 Diaphragm Assembly
5 EB-9547 Amvil
7 EB-9550-3 Filot BEudy Assembly
8 EB-13681-2 Diaphragm Assembiy
+8 E5-13681-3 Diaphragm Assembly
ig EB-13681-4 Diaphragm Assemol
E EB-10681-7 Diaphragm Assemaly
* BA =B-16661-4 Diapnragm Assemo!y
EA EB-16561-6 Diapnragm Assemoly
9 ЕВ-16682-1 Spacer Ring
1 See Tahle See Table
234-349 EE-9348-3 Orifice Assembly
AJA EB-9248-5 Orifice Assembly
“42 EB-12926-1 Diaghragm
Ta EB- 11580 Spring
135 EB-11580 Spring
ED ЕВ-1032-26 Screw
a EB-1120 Mut
"19 EB-13674 Pintla
"70 EB-130-012-1-70. O-ring
27 EB-9212 Conical Spring
Z2A —-EB-0039 Curical Spring
23 EB-13676 Plug
234 EB-15617-1 Flug
* For EA-16803-1 Rarvice Kit Only.
2 For BEA-16603-6 Sorvice Kit hl
For EA-0603-7 Service Hit сиу,
4 For EA-16603-8 Services Kit Orly
For EA-16502-9 Sandcs Kit Ск
B For EA 16602 12 Service К Only. a
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Service Kit Installation
Model 80 Service Kit {Standard Unit)
For Al Units
|. Check parts in the EA-16603 servise kit agairs!
parts marked with an astarisk in the exploded view
and te essociated table,
For Standard Unite
E. Тот out range screw Assembly (1) © relieve tan-
sion on spring.
For Screw Adjust (S) Unit
2. Loosen Nut (18) and turn out Range Screw (1B) ©
relieva tension on sping
For Tamper Proof (T) Unit
2 Hemcve Cap Mut (1A), lbosan Nut (18) and tum
out Range Screw (18) to relieve tension an spring.
For All Units
3. Remove Four Bonnet Screws (15). Sel aside range
Spring (5) and Spring Cas (3).
CAUTION: Spring (13) is in compression. Screws
should be removed carefully, allowing
the spring tc expand.
Set aside Spring (13), after removing Bennet As-
sembly (2), Dhaphragm Assembly (4), Plot Sody
Assembly (7), Diaphragm (12) spacer Ring (9), and
Diaphragm Assembly (8) frorr Body and Valve As-
senbiv (10), Remove any pipe fittings in body ports.
4. Remove Orifice Assembly (11) and Gasket (21)
from Body and Valve Assemely (10).
5. Unscrew Plug (23) fram Rody (12). Remove and
discard Pintle (19) and retain Corical Spring (22).
6. Neplace O Ring (20) on Plug (23) ath Q Fing from
kit. Lubricate with silicone grease. Place Conical
spring (22) wide end down, into cup of Plug (23).
Clean Racy Aszemblise (10) anc (7) with a suit-
able solvent. Blow dry with compressed air.
7. Tum body (107 over, so that plug and faces ua,
8. Place Pintl2 {19} from kit into plug end of body (10)
valve end up. Hold the pintle securely which ex-
tends from the oppusite end of Body € U; and in-
sert Conical Spring (28) and Plug (20) nto the elude
end of Body (0). Scraw the Plug (23) into Body
(10) until it is tight.
CAUTION: Insure that shart end of pintle (19) fits
inte top of Conical Spring (22).
9. Secure Orifice Assembly (11) and Gasket (21) fram
kit. Place Gasket {21) over threaded porticn of ori-
lice assembly (11) and screw the assembly into
‘he part on Body (10) opposite part marked
GAUGE.
10, Place Spacer Bing (Y) on Body (10) making sure
that six holes in the Spacer Ring match the six hcles
in Body (10),
11. Secure Diaphragm Assembly (12) from service kit
and place it 2n top of spacer Ring (9), making sure
that six holes in the Diaghragm (12) match the six
holes in the spacer Jing (9).
12. Place the Pilot Body Assembly (7) on tap of Cia-
phragm 12), making sure that the six holes on the
bottom cf Pilot Body Assembly (7) match the holes
in Diaphragm (12). Check that Anvil 171 is sealed
in the center hala of the spring plate.
13. Secure Diaparacm Assembly (4) from kit and place
lin the recess ofthe Filo; Bady Assembly (7), Place
Range Spring (51 and Spring Can (3) ontop of Dia-
phragm Assembly (£),
14, Position Bonnet Assernbly (2) over the Pilot Body
Assembly [7) so that signal sort in the Bonret As-
sembly (2) is over the port marked with the arrow
pointing into the unit.
NOTE: Qutput port is on the side opposite Spacer
Ring (9) which has the vent hole.
15. Grasp the Spacer Ring (2) firmly and lift up, being
careful that ll parts above it remain in aligrment.
Set the stacked: parts aside.
16. Secure Spring (13) from the kit and place il in the
cup cn Body (10), directly over the gintle (19).
17. Secure daphragm Assembly (81 from the kit and
place it on top of spring (13), making sure thatholes
in the Diaphragm mach the six holes in Body (10),
when the Spring (13) is compressed.
18. Carefully piace the assembled stack sel aside In
step 17 on top to the Diaphragm Assembly (8),
rmakirg sure large pistón is on top and tha: six holes
inthe spacer Ring (9) natch the hnlesin Ciaphragm
Assembly (8). Compress the Sgring (13) -and-in—:
sert four Screws (15) into the Bonnet Assembly (2),
until several threads are engaged on each screw.
19. Carefully tighten opposite screws uniil Spring (13)
15 compressed. Caution: insure that the screws do
not cut the diephragm as they are being tghtened.
2C. Cumplete tightening of the screws (15).
21. Lubricate Knah Assembly Scraw ‘1) with Molycote
type "GE" grease. For Tamper Proo’ unit replace Cap
(13) on regulator.
22. Reinstall the regulator in accord with instructions
in the OM and follow instructions in the operation
section for placing the regulalor Back in service.
Service Kit Installation
Model 80 Service Kit (Large Port Unt)
Fer All Units
1. Gheck parsanthe EA-7 4657 servia kilaga nst pails
marked with an asterisk in the exploced view and
the associatec table.
For Standard Units
2 Turn out range screw Assembly (1) to relieve ten.
sion on spring.
For Screw Adjust (5) Unit
2 Loosen Mut (18) and tum out Range Screw (1B) to
relieve tension on spring.
For lamper Proof (1) Unit
2 Hemowve Cap Mut (1A), loosen Mut [181 and turn aut
Hange Screw (15) to relieve tension on spring
For All Units
4. Remove Four Bonnet Screws (15). Sel aside range
Spring (5) anc Spring Cag (3).
CAUTION: Spring (134) is in compression. Screws
should be removed carefuly, allowing
the spring to expand,
Set aside Sprng (134), ater removing Bonnet As-
sembly (2, Diaphragm Assemoly (4), FlictBody As-
sembly (7), Diaphragm (12), spacer Ring (9) and
Ciaphragm Assembly (ВА) from Body and Valve As-
sembly (10). Remove any pipe fittings n body ports.
4. Remove Orifice Assembly (11A) and Gasket (21)
from Body and Valve Assembly (10).
5. Lisscrew Ptc (234) from Body (0) Remove anid
discard Pintle (12) and retain Conical Spring (224).
6, Rzplace Q Ring {20} on Plug (3A) with O Ring from
kit. Lubricate with silicone qreasz. Flace Conical
Spring (224) wide end down; into cup of Plug (2541
Cean Body ássembilies (70) end (7) with a sutable
solvent. Blow dry with compressed air.
Turn body (10) over, so thal pug 2nd faces ug.
8. Place Pinile (9) fom kit into plug end of kody (15,
valve and up. +olc the pinte securaly which extends
from the cpposite end of Body (10) and insert Zan
cal Sprinc (222A) and luc (20) into the plug end of
Body 10). >Cew the Plug (234) into Body (101 uni
itis tight.
CAUTION: Insure that short end of pintle (19) fits into
too of Conical Spring (224A).
on)
5, Secure Orifice Assembly (171A) and Gasket (27, from
kit, Place Gasket (21) aver threaded 2ortion af an-
fice assembly (114A) and screw the assembly into
the port on Body (10) apposite not marked GAUGE.
10, Place Spacer Ring (£) on Body (10) making sure
that six holes in the Space” Rirg match the six oles
in Body (10).
11. Securz Diaphragr Assembly (12) from sarvice Kit
and place it on top of spacer Ring (5), ma<ing sure
that six holes in the Diaphragm (12) match the six
holes in tre spacer Hing (5),
12. Place the Pilot Body Assembly (7) on too of Dis-
phragm (12), making sure that the six holes on thz
bottom of Pilot Воду Assembly (7) match the holes
in Diashregm (12). Check that Anvil (7) is seated 11
the center hola of the spring plate.
13. Secure Diaphragm Assembly (4) from kt and placa
it nthe recess of the Pilot ody Assembly 17). Placs
Range Spring (5) and Spring Cap (3) on top o° Die-
phragm Assembly (4)
14, Pasition Bonnet Assembly (2) over the Filot Body
Assembly (7) so that sigral cort in the Bonnet As-
sembly (=) is over the port marked with Ihe arrow
pointing wt The wt,
NOTE; Output port is on the side opposite Spacer
Ring (9) which has the vent hole.
15. Grasp the Spacer Ring (9) firmiy and lift up. being
careful that al parts above it remain in alignment
Set the stacked parts asice.
16. Secure Spring (134) Irom the Kit and place It In the
cup 07 Body (10), directly over the pirtle (191.
17. Secure diaphragm Assembly (BA) from the kit and
place it on top of spring (132A), making cure that holes
in the Diaphragm maich the six holes in Eody (107,
when the Spring (134) ls compressed.
18. Carefully place the assembled stack set aside in step
17 ontop ta the Ciaphragm Assembly (8A), making
sure large piston is on top and that six hcles n the
apacer Ring (9) mates the holes n Diaphragm As-
sembly (8). Compress the Sprinc (134A) and insert
four Screws (15) into the Bonnet Assembly (2), url
several threads ag engaged on ach screw.
19. Carefully tighten opposite screws unti Spring (1 3A)
is compressed. Cautian: \nsure that the screws do
not cut the diaphragm as they are being tightened.
29, Complete lightening of the screws (15).
21. Lubricate Knch Assembly Screw (1) with Mokycole
type “G" grease. For Tamper Proof unit replace Cap
(* BY on regulator.
22, Feinstall the ‘equlator in accord with nstructions n
the IOM and follow instructions in he operation sec-
ton for olacinq the requlator Eack in service.
MAINTENANCE
It will not be necessary to perform maintenance © a routine mature on this unit if oil free air is used.
TROUBLE SHOQTING
FROBLEM CHECK
Leakage Body screw tightness
Ciaphragm
High Bleed Relief pintle and relief seat
for damage or contamination
Cifncult to Adjust Adjusting screw and ball
Seal Ring fubrication
REPAIR PARTS LIST
Service Kit EA- 8603 is available fcr maintenance of the Made! BOD regulztor.
Service Kit | Port Size | Pressure Range
EA-16€03-7 | 48 0-20 psig
EA-16603-12 | 1,4, 3/8 0-20 psig
EA-16603-0 1/8 0-50 psig
EA-16603-1 | 1.4.38 0-60 psig
EA-16603-3 | 1/8 0-100 psig
EA-16603-5 | 114, 3/8 0-100 psig
LEGAL NOTICE:
The informaiion set larth in the foregoing Installation, Operation and Maintenance Instructions shall not be modified
or amended in any respect without prior written consent of Fairchild Industrial Products Company. In addition, the
nformation set forth herzin shal be ‘urnished with cach sroduct sold incorporating Fairenild's unit as a component
theraof.
(В
15000122000 U
Certified FAIRCHILD
INDUSTRIAL PRODUCTS COMPANY eS REED
3920 WEST POINTELYD. WINSTON-SALEM, NC 27103-6708 FM NO. 25571
TEL 336-659-3400 FAX 336-659-9323 15- 10000080D
Litho in USA
www. fairchildproducts.com Rev. N 08/02
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