Ingersoll-Rand ARO BD20-A Series, Operator'S Manual, Page: 5 / 20

BD20X-XXX-XXX-AXX (en) Page 5 of 20
PARTS LIST / BD20X-XXX-XXX-AXX FLUID SECTION

637494-XX Fluid Section Service Kits include: Balls (see BALL Option, refer to -XX in chart below), Diaphragms (see DIAPHRAGM
Option, refer to -XX in chart below), and items: 19, 70, 144 and 175 (listed below) plus 174 and 94276 Lubriplate FML-2 grease (page 7).
COMMON PARTS
Item Description
(size)
Qty Part No. Mtl
1
Connecting Rod (1) 97427 [C]
(BD20X-XXX-XXK-AXX only)
(1) 97448 [C]
43 Ground Lug
(see page 9)
(1) 93004 [Co]

70 Gasket (2) 94100 [B]
82 Sanitary Clamp (4) 97323 [SS]
COMMON PARTS
Item Description
(size)
Qty Part No. Mtl
83 Band-Clamp, Diaphragm (2) 97324 [SS]

144 “U” Cup
(3/16” x 1-3/8” OD)
(2) Y186-51 [B]
 
180 Gasket
(0.406” ID x 0.031” thick)
(4) 94098 [Co]

Air Section Service Kit Parts, see pages 7 and 8.
SEAT OPTIONS BD20X-XXX-XXX-AXX BALL OPTIONS BD20X-XXX-XXX-AXX
“21”

“22”
(2-1/2” dia.)
-XXX Seat Qty Mtl -XXX Seat Qty [Mtl]
-XXX
Ball Qty Mtl -XXX Ball Qty Mtl
-AXX 94328-A (4) [Sp] -FXX 95673 (4) [AI]
-XAX
93358-A (4) [Sp] -XSX 94805 (4) [SS]
-CXX 94328-C (4) [H] -SXX 94353 (4) [SS]
-XCX
93358-C (4) [H] -XTX 93358-4 (4) [T]
DIAPHRAGM OPTIONS BD20X-XXX-XXX-AXX
-XXX

Service Kit

“7”

“8”

“19”
(1/8” x 3-5/8” OD)
-XX = (Ball)
-XX = (Diaphragm)
Diaphragm Qty Mtl Diaphragm Qty Mtl “O” Ring Qty Mtl
-XXA 637494-XA 97326-M (2) [Sp] ----- --- --- 94356 (4) [E]
-XXC 637494-XC 97326-C (2) [H] ----- --- --- Y327-237 (4) [V]
-XXK 637494-XK 97436 (2) [TC] Y328-237 (4) [T]
-XXM 637494-XM 97326-M (2) [MSP] Y328-237 (4) [T]
-XXT 637494-XT 97327-T (2) [T] 97328-A (2) [SP] Y328-237 (4) [T]
CENTER SECTION OPTIONS BD20X-XXX-XXX-AXX
Item Description (size) Qty
Aluminum
BD20A-XXX-XXX-AXX
Part No. Mtl
5 Backup Washer
(2) 96503 [A]
(BD20X-XXX-XXK-AXX only)
(2) 97449 [SS]
68 Air Cap (1) 98237-1 [A]
69 Air Cap (1) 98237-2 [A]
126 Plug
(BD20X-XXX-XXX-AX0 only)
(1) Y17-13-S [SS]
131 Screw
(M10 x 1.5 - 6g x 120 mm)
(4) 94531 [C]

175 “O” Ring
(3/32” x 1” OD)
(2) Y325-117 [B]
181 Roll Pin
(5/32” OD x 3/4” long)
(shown on page 9)
(4) Y178-56-S [SS]
MANIFOLD / FLUID CAP MATERIAL OPTIONS BD20X-XXX-XXX-AXX
BD20X-AAX-XXX BD20X-BAX-XXX
2-11-1/2 NPTF Rp 2 (2-11 BSPP)
Item Description
(size)
Qty Part No. [Mtl] Part No. [Mtl]

6 Diaphragm Washer (2) 96503 [A] 96503 [A]

9 Washer (2) 93065 [SS] 93065 [SS]

14
Diaphragm Screw
(5/8” - 18 x 2-1/2’’)
(2) Y5-111-T [SS] Y5-111-T [SS]
15 Fluid Cap (2) 98238 [A] 98238 [A]
60 Inlet Manifold (1) 98239 [A] 98239-1 [A]
61 Outlet Manifold (1) 98240 [A] 98240-1 [A]
MATERIAL CODE
[A] = Aluminum
[B] = Nitrile
[C] = Carbon Steel
[CI] = Cast Iron
[Co] = Copper
[E] = E.P.R.
[H] = Hytrel
[Ha] = Hastelloy-C
[K] = PVDF
[L] = Long Life PTFE
[MSP] = Medical Grade Santoprene
[SH] = Hard Stainless Steel
[SP] = Santoprene
[SS] = Stainless Steel
[T] = PTFE
[TC] = PTFE Composite
[V] = Viton
NOTE: Seat options -AXX and -CXX do not require item 19 "O" ring.

Items not required with diaphragm options BD20X-XXX-XXK-AXX