ABOUT US BLOG CONTACT US

QUICK ORDER

Port Size

Coil

Coil Style

Flange Type

Flange Connection

Motor/IO Module

Plated

Range

Reduced Capacity

Set Point

Strainer

Valve Material

Parker A4AS Electric Shut-Off Inlet Regulators

The A4A outlet family of regulators are compact, heavy duty, pilot operated, and have remarkable functionality. The regulator will gradually close when downstream pressure begins to rise above the setting and will gradually open when pressure begins to fall below the setting. The regulator cannot maintain set-for pressure if uncontrolled branch pipe lines feed into the main pipeline downstream of the regulator. The valve's purpose is to modulate flow of refrigerant gas or liquid to maintain constant downstream pressure as set-for, despite load fluctuations.
Part Kits

 

 
20mm (3/4")
25mm (1 ")
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, 12-15
Spring/ Stem Kit
Range A/V
 202006
 
 1
 
 202006
 
 1
 
Range 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, 11-16
Spring Kit with Bonnet
Range A/V
 202008
 
 1
 
 202008
 
 1
 
Range D
 202009
 
 1
 
 202009
 
 1
 
12-14, 16
Spring Kit, Less Bonnet
Range A/V
 202481
 
 1
 
 202481
 
 1
 
Range D
 202482
 
 1
 
 202482
 
 1
 
17
Diaphragm
 Only Avail. with Kit
 
 1
 
 Only Avail. with Kit
 
 1
 
19
Gasket
 Only Avail. with Kit
 
 I
 
 Only Avail. with Kit
 
 1
 
16,17, 19
Diaphragm Kit
Range A/V
 200770
 
 1
 
 200770
 
 1
 
17
Diaphragms
Range D
 Only Avail. with Kit
 
 2
 
 Only Avail, with Kit
 
 2
 
16,17, 19
Diaphragm Kit
Range D
 200771
 
 1
 
 200771
 
 1
 
16-19
VC Vacuum Cartridge
 202004
 
 1
 
 202004
 
 1
 
16-19
 
 Pilot Seat/ Diaphragm Kit (Not A4AO)
 
 Range A
 
 202000
 
 1
 
 202000
 
 1
 
Range V
 
 202004
 
 1
 
 202004
 
 1
 
Range D
 
 202002
 
 1
 
 202002
 
 1
 
27
Plug Pkg, 1/4" NPT
 202552
 
 5
 
 202552
 
 5
 
28
Adapter
 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
 200703
 
 1
 
 200703
 
 1
 
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
 
 
 Not Available
 
 
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
"O" Ring
 Only Avail. with Kit
 
 1
 
 Only Avail. with Kit
 
 1
 
34-37
Spring Kit, (A4A) Closing (A4AK)
 202300
 
 1
 
 202300
 
 1
 
202298
 
 1
 
 202298
 
 1
 
33
Plug/Stem Assembly
 Only Avail. with Kit
 
 1
 
 Only Avail. with Kit
 
 1
 
40
Washer, Flat
 Only Avail. with Kit
 
 1
 
 Only Avail. with Kit
 
 1
 
41
Packing, Stem
 Only Avail. with Kit
 
 1
 
 Only Avail. with Kit
 
 1
 
42
Nut, Packing
 Only Avail. with Kit
 
 1
 
 Only Avail. with Kit
 
 1
 
33, 34-37, 40-42
Full Cap. Plug Kit, Modul.
 A4A
 
 202021
 
 1
 
 202022
 
 1
 
A4AK
 
 202037
 
 1
 
 202038
 
 1
 
33, 34-37, 40-42
50% Cap. Plug   Kit, Modul.
 A4A
 
 202029
 
 1
 
 (*)
 
 
A4AK
 
 202036
 
 1
 
 (*)
 
 
33, 34-37, 40-42
35% Cap. Plug
Kit, Modul.
 A4A
 
 Not Available
 
  
 
 Not Available
 
 
A4AK
 
 Not Available
 
  
 
 Not Available
 
 
33, 34-37, 40-42
17% Cap. Plug Kit, Modul.
 (A4A)
 
 202030
 
 1
 
 (*)
 
 
(A4AK)
 
 202030
 
 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
 
 202100
 
 1
 
 202100
 
 1
 
 202100
 
 1
 
 202100
 
 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
 
 I
 
 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, 12-15
 
 202006
 
 1
 
 202006
 
 1
 
 202006
 
 1
 
 202006
 
 1
 
 202006
 
 1
 
 202006
 
 1
 
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, 11-16
 
 202008
 
 1
 
 202008
 
 1
 
 202008
 
 1
 
 202008
 
 1
 
 202008
 
 1
 
 202008
 
 1
 
202009
 
 1
 
 202009
 
 1
 
 202009
 
 1
 
 202009
 
 1
 
 202009
 
 1
 
 202009
 
 1
 
12-14, 16
 
 202481
 
 1
 
 202481
 
 1
 
 202481
 
 1
 
 202481.
 
 1
 
 202481
 
 1
 
 202481
 
 1
 
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
 
16-19
 
 202004
 
 1
 
 202004
 
 1
 
 202004
 
 1
 
 202004
 
 1
 
 202004
 
 1
 
 202004
 
 1
 
16-19
 
 202000
 
 1
 
 202000
 
 1
 
 202000
 
 1
 
 202001
 
 1
 
 202001
 
 1
 
 202001
 
 1
 
202004
 
 1
 
 202004
 
 1
 
 202004
 
 1
 
 202004
 
 1
 
 202004
 
 1
 
 202004
 
 1
 
202002
 
 1
 
 202002
 
 1
 
 202002
 
 1
 
 202003
 
 1
 
 202003
 
 1
 
 202003
 
 1
 
27
 
 202552
 
 5
 
 202552
 
 5
 
 202552
 
 5
 
 202552
 
 5
 
 202552
 
 5
 
 202552
 
 5
 
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
 
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
 
 
 Not Available
 
 
 Not Available
 
 
 Not Available
 
 
 Not Available
 
 
 Not7vailable
 
 
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
 
 Onlv 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

Sku Port Size Check Valve Coil Coil Style Flange Type Flange Connection Range Reduced Capacity Set Point Strainer Price Qty Add To Cart
3/4 A4AS RA 1-1/4SW 120 ST CK4 A40FA200A7S32B1XY4SN
See Details		 20mm (3/4 in) w/ CK-4 120/60 Leaded, Standard SW 1 1/4 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$1,358.31
3/4 A4AS RA 3/4SW 230 CK4 A40FA200A7S20F1XN4SN
See Details		 20mm (3/4 in) w/ CK-4 230/50 Leaded, Standard SW 3/4 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) No Strainer
1
$1,121.76
1 A4AS RA 1-1/4SW 120 ST CK4 A40FA250A7S32B1XY4SN
See Details		 25mm (1 in) w/ CK-4 120/60 Leaded, Standard SW 1 1/4 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$1,558.95
1-1/4 A4AS RA 1-1/2SW 120G ST CK4 A40FA320A7S38B3XY4SN
See Details		 32mm (1 1/4 in) w/ CK-4 120/60 Leaded, Green LED Pilot Light SW 1 1/2 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$2,054.28
1-1/4 A4AS RA 1-1/4SW 120 CK4 A40FA320A7S32B1XN4SN
See Details		 32mm (1 1/4 in) w/ CK-4 120/60 Leaded, Standard SW 1 1/4 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) No Strainer
1
$1,685.49
1-1/4 A4AS RA 1-1/2WN 120 ST C K4 A40FA320A7W38B1XY4SN
See Details		 32mm (1 1/4 in) w/ CK-4 120/60 Leaded, Standard WN 1 1/2 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$1,970.49
1-5/8 A4AS RA 2SW 120G QD CK4 A40FA400A7S50B6XN4SN
See Details		 40mm (1 5/8 in) w/ CK-4 120/60 DIN, Green LED Pilot Light SW 2 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) No Strainer
1
$2,251.50
1-5/8 A4AS RA 2SW 120R QD ST C K4 A40FA400A7S50B5XY4SN
See Details		 40mm (1 5/8 in) w/ CK-4 120/60 DIN, Red LED Pilot Light SW 2 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$2,765.64
1-5/8 A4AS RA 2SW 120 ST CK4 A40FA400A7S50B1XY4SN
See Details		 40mm (1 5/8 in) w/ CK-4 120/60 Leaded, Standard SW 2 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$2,648.79
1-5/8 A4AS RA 1-1/2SW ST CK4 A40FA400A7S38X0XY4SN
See Details		 40mm (1 5/8 in) w/ CK-4 No Coil, AC No Coil Style SW 1 1/2 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$2,548.47
2 A4AS RA 2SW 120G CK4 A40FA500A7S50B3XN4SN
See Details		 50mm (2 in) w/ CK-4 120/60 Leaded, Green LED Pilot Light SW 2 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) No Strainer
1
$2,443.02
2 A4AS RA 2SW 120G ST CK4 A40FA500A7S50B3XY4SN
See Details		 50mm (2 in) w/ CK-4 120/60 Leaded, Green LED Pilot Light SW 2 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$2,957.16
2 A4AS RA 2SW 120 CK4 A40FA500A7S50B1XN4SN
See Details		 50mm (2 in) w/ CK-4 120/60 Leaded, Standard SW 2 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) No Strainer
1
$2,334.15
2 A4AS RA 2SW 120 ST CK4 A40FA500A7S50B1XY4SN
See Details		 50mm (2 in) w/ CK-4 120/60 Leaded, Standard SW 2 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$2,848.29
2-1/2 A4AS RA 3SW 120R QD ST C K4 A40FA650A7S75B5XY4SN
See Details		 65mm (2 1/2 in) w/ CK-4 120/60 DIN, Red LED Pilot Light SW 3 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$3,857.76
2-1/2 A4AS RA 3SW 120G ST CK4 A40FA650A7S75B3XY4SN
See Details		 65mm (2 1/2 in) w/ CK-4 120/60 Leaded, Green LED Pilot Light SW 3 in 0.35 to 10 (5 to 150) Full Capacity 2.8 (40) w/ Strainer
1
$3,849.78