Check Valve
Flange Connection
Flange Type
Reduced Capacity
Set Point
Strainer
Valve Material
Parker A4AO No Variation
A4AO No Variation
Part Kits
20mm (3/4î) | 25mm (1î) | |||||||
Item No. | Description | Kit No. | Qty | Kit No. | Qty | |||
1 | Seal Cap | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
2 | Seal Cap Gasket | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
1-2 | Cap Kit, Seal | 202110 | 1 | 202110 | 1 | |||
3 | Nut, Packing | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
4 | Packing,Stem | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
5 | Washer, Flat | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
3-5 | Packing Kit, Stem | 202100 | 1 | 202100 | 1 | |||
6 | Stem, Adjusting | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
4-6 | Stem Kit, Adjusting | 202120 | 1 | 202120 | 1 | |||
12 | Plate, Spring, Upper | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
13 | Spring, Comp. | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
14 | Plate, Spring, Lower | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
15 | Follower, Diaphragm | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
3-5,6, | Spring | Rge. V | 202006 | 1 | 202006 | 1 | ||
12-15 | Stem Kit | Rge. D | 202007 | 1 | 202007 | 1 | ||
8 | Bonnet | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
11 | Screw, Hx. Hd. | Only Avail. with Kit | 8 | Only Avail. with Kit | 8 | |||
16 | Bonnet Gasket | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
1-6,8 | Spring Kit | Rge. V | 202008 | 1 | 202008 | 1 | ||
11-16 | with Bonnet | Rge. D | 202009 | 1 | 202009 | 1 | ||
12-14 | Spring Kit | Rge. V | 202481 | 1 | 202481 | 1 | ||
16 | less Bonnet | Rge. D | 202482 | 1 | 202482 | 1 | ||
17 | Diaphragm | Only AvTl. with Kit | 1 | Only Avail. with Kit | 1 | |||
19 | Gasket | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
16,17,19 | Diaphragm Kit | Rge. V | 200770 | 1 | 200770 | 1 | ||
17 | Diaphragms | Rge. D | Only Avail. with Kit | 2 | Only Avail. with Kit | 2 | ||
16,17,19 | Diaphragm Kit | Rge. D | 200771 | 1 | 200771 | 1 | ||
19 | Gasket | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
22 | Nut, Retainer | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
23 | Spring | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
24 | Plug, Pilot | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
25 | O-Ring | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
26 | O-Ring | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
19,22-26 | Plug Kit, Pilot | 200777 | 1 | 200777 | 1 | |||
21 | Adapter | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
19,22-26 | Plug Kit, Pilot A4AO/A4AOS | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
21,19,22-26 | Outlet-Regulator Kit | OR-50(200516) | 1 | OR-50(200516) | 1 | |||
(See List Price Schedule) | ||||||||
20 | Ring/Tube Assbly. Flge. | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
45 | Gasket, Flange | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
20,45 | Flge. Ring/Tube Kit A4AO/A4AL | FRT-20 (200439) | 1 | FRT-25 (200439) | 1 | |||
27 | Plug Pkg. 1/4" NPT | 202552 | 5 | 202552 | 5 | |||
28 | Adapter, A4AO/A4AOE | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
29 | Gasket | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
19,28,29 | Adapter Kit A4AO/A4AOE | 200703 | 1 | 200703 | 1 | |||
28A | Adapter, A4AOS/A4AOSE | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
29 | Gasket | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
19,28A,29 | Adapter Kit A4AOS/A4AOSE | MD-25(200591) | 1 | MD-25 (200591) | 1 | |||
(See List Price Schedule) | ||||||||
30 | Piston/Stem Assembly | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
29,30 | Piston Kit | 200760 | 1 | 200760 | 1 | |||
32 | Valve Body | Not Available | NotAvailable | |||||
34 | Spring, Comp. | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
35 | Washer, Flat | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
36 | Wiper, Dirt | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
37 | ìOîRing | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | |||
34-37 | Spring Kit, Closing | 202300 | 1 | 202300 | 1 | |||
32mm (1-1/4") | 40mm (1-5/8") | 50mm (2") | 65mm (2-1/2") | 75mm (3") | 100mm (4") | |||||||
Item No. | Kit No. | Qty | Kit No. | Qty | Kit No. | Qty | Kit No. | Qty | Kit No. | Qty | Kit No. | Qty |
1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
2 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
1-2 | 202110 | 1 | 202110 | 1 | 202110 | 1 | 202110 | 1 | 202110 | 1 | 202110 | 1 |
3 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
4 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
5 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
3-5 | 202100 | 1 | 202100 | 1 | 202110 | 1 | 200110 | 1 | 200110 | 1 | 200110 | 1 |
6 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
4-6 | 202120 | 1 | 202120 | 1 | 202120 | 1 | 202120 | 1 | 202120 | 1 | 202120 | 1 |
12 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
13 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
14 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
15 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
3-5,6 | 202006 | 1 | 202006 | 1 | 202006 | 1 | 202006 | 1 | 202006 | 1 | 202006 | 1 |
12-15 | 202007 | 1 | 202007 | 1 | 202007 | 1 | 202007 | 1 | 202007 | 1 | 202007 | 1 |
8 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
11 | Only Avail. with Kit | 8 | Only Avail. with Kit | 8 | Only Avail. with Kit | 8 | Only Avail. with Kit | 8 | Only Avail. with Kit | 8 | Only Avail. with Kit | 8 |
16 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
1-6,8 | 202008 | 1 | 202008 | 1 | 202008 | 1 | 202008 | 1 | 202008 | 1 | 202008 | 1 |
11-16 | 202009 | 1 | 202009 | 1 | 202009 | 1 | 202009 | 1 | 202009 | 1 | 202009 | 1 |
12-14 | 202481 | 1 | 202481 | 1 | 202481 | 1 | 202481 | 1 | 202481 | 1 | 202481 | 1 |
16 | 202482 | 1 | 202482 | 1 | 202482 | 1 | 202482 | 1 | 202482 | 1 | 202482 | 1 |
17 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
19 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
16,17,19 | 200770 | 1 | 200770 | 1 | 200770 | 1 | 200770 | 1 | 200770 | 1 | 200770 | 1 |
17 | Only Avail. with Kit | 2 | Only Avail. with Kit | 2 | Only Avail. with Kit | 2 | Only Avail. with Kit | 2 | Only Avail. with Kit | 2 | Only Avail. with Kit | 2 |
16,17,19 | 200771 | 1 | 200771 | 1 | 200771 | 1 | 200771 | 1 | 200771 | 1 | 200771 | 1 |
19 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
22 | Only Avail, with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
23 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
24 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
25 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
26 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
19,22-26 | 200777 | 1 | 200777 | 1 | 200777 | 1 | 200778 | 1 | 200778 | 1 | 200778 | 1 |
21 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
19,22-26 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
21,19,22-26 | OR-50 (200516) | 1 | OR-50 (200516) | 1 | OR-50 (200516) | 1 | OR-200 (200517) | 1 | OR-200 (200517) | 1 | OR-200 (200517) | 1 |
20 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
45 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
20,45 | FRT-32 (200441) | 1 | FRT-40 (200443) | 1 | FRT-50 (200443) | 1 | FRT-65 (200445) | 1 | FRT-75 (200447) | 1 | FRT-100 (200449) | 1 |
27 | 202552 | 5 | 202552 | 5 | 202552 | 2 | 202552 | 2 | 202552 | 2 | 202552 | 2 |
28 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
29 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
19,28,29 | 200700 | 1 | 200725 | 1 | 200725 | 1 | 200685 | 1 | 200713 | 1 | 200716 | 1 |
28A | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
29 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
19,28A,29 | MD-32 (200593) | 1 | MD-50 (200595) | 1 | MD-50 (200595) | 1 | MD-65 (200597) | 1 | MD-75 (200599) | 1 | MD-100 (200606) | 1 |
30 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
29,30 | 200767 | 1 | 200389 | 1 | 200389 | 1 | 200391 | 1 | 200393 | 1 | 200227 | 1 |
32 | Not Available | NotAvailable | NotAvailable | Not Available | Not Available | Not Available | ||||||
34 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
35 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
36 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
37 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 |
34-37 | 202301 | 1 | 202302 | 1 | 202302 | 1 | 202303 | 1 | 202304 | 1 | 202305 | 1 |
20mm (3/4î) | 25mm (1î) | ||||||
Item No. | Description | Kit No. | Qty | Kit No. | Qty | ||
3 3 | Plug/Stem Assembly | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | ||
4 0 | Washer, Flat | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | ||
4 1 | Packing, Stem | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | ||
4 2 | Nut, Packing | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | ||
33,34-37,40-42 | Full Cap. Plug Kit Modul. | 202021 | 1 | 202022 | 1 | ||
33,34-37,40-42 | 50% Cap. Plug Kit, Modul. | 202029 | 1 | (*) | |||
33,34-37,40-42 | 35% Cap. Plug Kit, Modul. | Not Available | Not Available | ||||
33,34-37,40-42 | 17% Cap. Plug Kit, Modul. | 202030 | 1 | (*) | |||
3 7 | O-Ring | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | ||
3 8 | Cover, Bottom | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | ||
4 0 | Washer, Flat | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | ||
4 1 | Packing, Stem | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | ||
37,38,40,41 | Cover Kit | 200761 | 1 | 200761 | 1 | ||
4 2 | Nut, Packing | Only Avail. with Kit | 1 | Only Avail. with Kit | 1 | ||
Packing Kit, Stem | 202100 | 1 | 202100 | 1 | |||
4 3 | Gasket | Only Avail. with Kit | 1 | Only Avail. with Kit | |||
4 4 | Seal Cap | Only Avail. with Kit | 8 | Only Avail. with Kit | 8 | ||
43,44 | Seal Cap, Kit | 202110 | 1 | 202110 | 1 | ||
33-38,40-44 | Full Cap. Bottom Assembly | Kit 202010 | 1 | 202011 | 1 | ||
33-38,40-44 | 50% Cap. Bottom Assembly | Kit 202347 | 1 | (*) | 1 | ||
33-38,40-44 | 17% Cap. Bottom Assembly | Kit 202346 | 1 | (*) | 1 | ||
3-6,12-19, | Full Cap. Repair | ||||||
29,30,33-37 | Kit, Req. Rge. V | 202040 | 1 | 202043 | 1 | ||
40-42 | Rge. D | 202042 | 1 | 202045 | 1 | ||
3-6,12-19, | 50% Cap. Repair | ||||||
29,30,33-37 | Kit. Reg. Rge. V | 202354 | 1 | (*) | 1 | ||
40-42 | Rge. D | 202353 | 1 | (*) | 1 | ||
3-6,12-19, | 17% Cap. Repair | ||||||
29,30,33-37 | Kit. Reg. Rge. V | 202351 | 1 | (*) | 1 | ||
40-42 | Rge. D | 202350 | 1 | (*) | 1 | ||
2,16(2),19(2) | |||||||
25,26,29,37, | Gasket Kit A4/S4 | 202112 | 202112 | ||||
43,45(3) | |||||||
IndvíI Gaskets, O- Rings & Valve Packing sold & packaged in qtys only as indicated | |||||||
2 9 | Gasket Pkg. Adapter | 202406 | 5 | 202406 | 5 | ||
3 7 | O-Ring/Gasket Pkg. Bottom | Cap 202384 | 3 | 202384 | 3 | ||
4 3 | Gasket Pkg. Seal Cap (Bottom) | 202408 | 1 2 | 202408 | 1 2 | ||
2 | Gasket Pkg. Seal Cap (Top) | 202408 | 1 2 | 202408 | 1 2 | ||
4 5 | Gasket Pkg. Flange | 202079 | 1 2 | 202079 | 1 2 | ||
4 | Packing Pkg. Stem (Top) | 202478 | 2 5 | 202478 | 2 | ||
4 1 | Packing Pkg. Stem (Bottom) | 202478 | 2 5 | 202478 | 2 5 | ||
Bolt Package Kits | |||||||
1 1 | Bolt Package, A4AO Bonnet | 202247 | 8 | 202247 | 8 | ||
3 1 | Bolt Package, Adapter | 202248 | 8 | 202249 | 8 | ||
3 9 | Bolt Package, Bottom Cap | Not Required | Not Required | ||||
Flange Bolt Package includes bolts and nuts; no gaskets | |||||||
46,47 | Bolt Kit, Flange | 201585 | 1 | 201585 | 1 | ||