Technical data

Parts
312185S 17
MD2 Valve
The parts listed below are common to all MD2 Dispense
valves. Parts which vary are found in the table at the bot-
tom of this page.
❖ Parts included in Valve Air Cylinder Repair Kit
255217 (purchase separately).
✖ Parts included in Valve Lube Seal Repair Kit 255218
(purchase separately).
* Parts included in Front Valve Repair Kit 255219 (pur-
chase separately).
† Parts included in Front Valve Repair Kit 255220 (pur-
chase separately).
Ref Part Description Qty
1 120762 RING, retainer 1
2 15K496 HOUSING, air cylinder 1
3 102920 NUT, lock 2
4❖✖ 157628 O-RING, buna-n 2
5✖ 15K421 SHAFT, primary 2
6❖ 156593 O-RING, buna-n 2
7❖ 551181 BEARING, sleeve 1/4, 3/8, 1/4,
nylon
2
8 551183 PIN, dowel 1/8 x 1.25 18-8 sst 1
9 626067 PISTON, air cylinder 1
11 15K422 BEARING, seal 2
12✖ 551191 PACKING, u-cup, nitrile 2
13✖ 113746 O-RING 2
14 15K441 HOUSING, inlet 2
15✖ 120768 SEAL, UHMWPE 2
16 15K442 SPACER, valve 2
17 15K444 CLAMP, adapter, inlet 2
18 121224 SCREW, cap, socket head, M5 x
0.8 x 8 mm
2
19 107530 SCREW, cap, socket head, high
strength
2
20*† 117517 O-RING, fluoroelastomer 2
32 15K688 NUT, mixer; not shown 1
33 104765 PLUG, pipe, headless; not shown 2
36✖ 118594 O-RING, fluoroelastomer 2
38 551189 LUBRICANT, grease 3 oz. car-
tridge; not shown
1
39 120892 FITTING, grease 4
Ref Part Description Qty
Ref.
No. Description
1:1 10:1
Qty255179 255181
21
KNOB, snuff-back, adjust
15K419 15K419 1
22a
CAP, air cylinder, snuff-back
15K420 15K420 1
❖23 O-RING, buna-n
156454 156454 3
24
STOP, snuff-back
15V627 15V627 1
25
NEEDLE, snuff-back *15K428 *15K428
2
26
SEAL, UHMWPE *120784 *120784
2
27
SEAT, needle *15K460 *15K460
2
29
HOUSING, nose
15K445 15K649 1
30
TUBE, injector, sst
15V624 1
31
CAP; not shown
15K652 15V628 2
40 ADAPTER, ratio check 255247 256794 1
47 TIP, injector 15V623 1
48 TOOL, assembly aid; not shown
256793 1