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Page 10 / Bulletin 22-00 A

12.334

8.938

1.938

3.540

.551

A

B

C

D

E

12.334

8.938

1.938

3.540

.719

A

B

C

D

E

Dimension

Port Size

20 - 25 mm

(3/4” - 1”)

32 mm

(1-1/4”)

40 - 50 mm

(1-1/2” - 2”)

A

144.5 mm

(5.69”)

176.3 mm

(6.94”)

227.1 mm

(8.94”)

B

11.2 mm

(0.44”)

13.7 mm

(0.54”)

14.0 mm

(0.55”)

C

90.0 mm

(3.54”)

90.0 mm

(3.54”)

90.0 mm

(3.54”)

D

266.7 mm

(10.5”)

299.5 mm

(11.79”)

312.7 mm

(12.31”)

E

41.4 mm

(1.63”)

53.1 mm

(2.09”)

49.3 mm

(1.94”)

A4W Butt Weld (BW) Dimensions

Dimension

Port Size

20 - 25 mm

(3/4” - 1”)

32 mm

(1-1/4”)

40 - 50 mm

(1-1/2” - 2”)

A

144.5 mm

(5.69”)

176.3 mm

(6.94”)

227.1 mm

(8.94”)

B

12.7 mm

(0.50”)

12.7 mm

(0.50”)

16.0 mm

(0.63”)

C

90.0 mm

(3.54”)

90.0 mm

(3.54”)

90.0 mm

(3.54”)

D

266.7 mm

(10.5”)

299.5 mm

(11.79”)

312.7 mm

(12.31”)

E

41.4 mm

(1.63”)

53.1 mm

(2.09”)

49.3 mm

(1.94”)

A4W Socket Weld (SW) Dimensions

Summary of Contents for A4W Series

Page 1: ...are its stainless steel and aluminum construction which allows it to withstand corrosive environments and its overall light weight minimizes installation costs Product Features Suitable for Ammonia CO...

Page 2: ...er an Electric Shut Off S or a Electric Wide Open Bypass B The bonnet which contains the 3 range set spring and adjustment stem The A4W is a normally closed valve furnished with socket weld and weld n...

Page 3: ...he presence of system impurities The upward movement of the pilot plug piston causes the pilot plug piston seat to unseat allowing the pressure on top of the piston to vent through the pilot plug pass...

Page 4: ...operation cross section diagram than the standard A4W but the regulating portion of the valve works in the same manner as described in the A4W principles of operation Note The passages in the A4WB po...

Page 5: ...s section shows the B and S solenoid features When both solenoids are de energized there is no flow from the top of the piston and therefore the pressure on top of the piston is equalized to that on t...

Page 6: ...e is then to be backed out approximately 1 16 of an inch before welding Use of welding rings is optional but recommended for butt weld valves They help alignment control gap for full penetration weldi...

Page 7: ...tors with B features can only be adjusted with the pilot solenoid de energized Regulators with the S feature can only be adjusted with the solenoid energized A4W Disassembly See also Bulletin RSBCV Al...

Page 8: ...16 19 20 21 22 23 24 25 26 27 29 31 28 32 30 34 33 23 48 47 46 45 44 35 36 37 38 39 40 41 42 43 A4W Exploded Parts View A4WB shown Note The port plate for a A4W and A4WE inlet pressure regulator does...

Page 9: ...08797 208798 208799 35 39 41 42 Wear Seal Piston 208819 208819 208820 208821 208821 2 5 6 13 14 16 17 20 35 38 41 42 Gasket O Ring A4W A4WK Only 208823 208803 208804 208805 208806 2 5 6 13 14 16 17 20...

Page 10: ...0 mm 3 54 90 0 mm 3 54 90 0 mm 3 54 D 266 7 mm 10 5 299 5 mm 11 79 312 7 mm 12 31 E 41 4 mm 1 63 53 1 mm 2 09 49 3 mm 1 94 A4W Butt Weld BW Dimensions Dimension Port Size 20 25 mm 3 4 1 32 mm 1 1 4 40...

Page 11: ...ating Specialties before proceeding with the work Before doing any service work always be sure to disconnect the power and isolate the valve Failure to do so will result in venting of ammonia Tighten...

Page 12: ...ivision Defective products or parts thereof returned to the factory with transportation charges prepaid and found to be defective by factory inspection will be replaced or repaired at Refrigerating Sp...

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