5-5/8(14.3)

21-3/16(53.8)

2-1/8(5.4)

15 (38.1)

4-3/4(12.1)

14-1/2 (36.8)

5-1/2(14.1)

13-7/16(34.1)

4 (10.2) 2-9/16 (6.5)

35-5/8(90.5)

42-7/8(108.9)

46(116.8)

31-3/8(79.7)

8-1/4(21)

1 (2.5)

5-3/8(13.7)

5-3/8(13.7)

Adjustable head

1st stageoutlet

(2" weldflange)

1st stage inlet(2" weld flange)

1st stageinlet

(2" weldflange)

2nd stage outlet(2" weld flange)

Suction valveunloaders(optional)

1/4” NPTdrain

Crankcaseoil heater(optional) Four 9/16 (1.4)

diameterholes

20(50.8)

Appendix C—Outline dimensionsmodel d791 (two stage) bare Compressor with flywheel

Inches (Centimeters)

C. Outline dimensions

24

Suctionvalve unloaders

(optional)

Inlet(2" weldflange)

9-16" (1.4)Hole Diameter

Inletpressureguage

Outletpressuregauge

Outlet(2" weldflange)

Crankcase heater(optional)

2-1/8"(5.3)

8-1/4"(20.9)

35-5/8"(90.4)

43-1/4"(109.9)

Inlet(2" weldflange)

1/4" NPT drain

24-15/32"(62.1)

21.2"(53.8)

5-5/8"(14.3)

13-1/4"(33.6)

4-3/4"(12.0)

1"(2.5)

5-1/2"(13.9)

5-3/8"(13.6)

10-1/4"(26.0)

5-3/8"(13.6)

5-1/2"(13.9)

5-1/2"(13.9)

Appendix C—Outline dimensionsmodel d891 (single stage) bare with flywheel

Inches (Centimeters)

25

Inlet(2 ″ w

eld flange)

Inlet(2″ w

eld flange)

Outlet

(2″ weld flange)

Appendix C—Outline dimensionsmodel d891 (single stage) with 103 mounting

Inches (Centim

eters)

26

Appendix C—Outline dimensionsmodel d891 (single stage) with 107b mounting

Inches (Centim

eters)

27

CORKENCORKEN

FLOW

CORKEN

72(182.88)

41-21/32(105.81)

9-3/32(23.07)

7-1/16(17.96)

24(60.96)

3-21/32(9.31)

3-23/32(9.45)

6-1/2(16.49)

3/4(1.91)

45(114.30)

63(160.02)

30-5/64(76.41)

22-1/2(57.15)

Low oil

pressure switch

(optional)

Drain valve1" N

PT

Inletpressure

gauge

Outlet 2" w

eld flange

Electric m

otor driver

Outlet pressure gauge

Suction valve

unloaders (optional)

Inlet2" 300# R

Fw

eld neck flange

Relief valve

2" NP

T pipe away

High liquid level

shutdown sw

itch1/2" N

PT

High liquid level

alarm sw

itch1/2" N

PT

Crankcase

oil drain

Belt guard

Crankcaseheater

(optional)

Adjustable driver

slide baseU

seeight 3/4"

anchorbolts

5-15/16(15.09)

10-11/16(27.15)

28-15/16(73.51)

34-15/16(88.75)

40-15/16(103.99)

68(172.72)

12-1/2(31.75)

5-1/2(13.92)

79-13/32(201.69)

9/16(1.43) 9/16

(1.43)

27(68.58)

Appendix C—Outline dimensionsmodel d891 (single stage) with 109b mounting

Inches (Centim

eters)

28

2-9/16 (7)

1 (3)

5-3/8(14)

Four 9/16″ (1.4)diameter holes

21-3/16(54)

20 (51)

5-5/8(14)

2-1/8 (5) 13-3/4 (35)

15 (38)

4-3/4(12)

5-1/2 (14)

14-1/2 (37)

43-5/8(111)

50-7/8(129)

54(137)

Crankcaseoil heater(optional)

39-3/8(100)

1/4″ NPTupper

distancepiece

Suction valveunloaders(optional)

4 (10)

8-1/4(21)

1/4″ NPTlower

distancepiece

1st stageoutlet (2″

weld flange)

1st stageinlet (2″

weld flange)

1st stageinlet (2″

weld flange)

2nd stageoutlet (2″

weld flange)

Adjustablehead

5-3/8(14)

Appendix C—Outline dimensionsmodel t791 (two stage) bare Compressor with flywheel

Inches (Centimeters)

29

5-5/8(14.3)

21-3/16(53.8)

20(50.8)

2-1/8 (5.4)

4-3/4 (12.1)

15 (38.2) 14-1/2 (36.9)

5-1/2 (14.1)

13-5/8 (34.5)

Crankcaseoil heater(optional)

8-1/4(21)

1 (2.5)

5-3/8(13.6)

5-3/8(13.6)

1/4″ upperdistance

piece

51-1/4(130.1)

43-5/8(110.8)

Suction valveunloaders(optional)

5-7/16(13.9)

Inlet (2″ weld flange)

5-7/16(13.9)

Outlet (2″weld flange)

1/4″ NPTlower

distancepiece

Four 9/16″ (1.4)diameter holes

Inlet (2″ weld flange)

Appendix C—Outline dimensionsmodel t891 (single stage) bare Compressor with flywheel

Inches (Centimeters)

30

Beltguard

Inlet(2″ w

eld flange)

Crankcaseoil drain

24 (60.96)7

(17.78)3-9/16(9.13)

57-1/4(145.34)49-5/8

126.10

31(78.74)

5-3/4(14.61)

1-1/2(3.81)

2(5.08)

Pressure gauge

(Inlet)

Suction valve unloaders

(optional)5-1/2

(13.92)5-1/2

(13.92)

Inlet(2″ w

eld flange)P

ressure gauge(outlet)

Outlet

(2″ weld flange)

Purge connections

(1/4″)

Crankcase heater

(optional)E

lectric motor driver

Low oil pressure sw

itch(optional)

18 (45.72)

4(10.21)

10 (25.40)

56 (142.24)

Adjustable driver slide base

Use six 3/4″

anchor bolts6

(15.24)

36 (91.44)

Purge

connections(1/4″)

22-1/2 (57.15)

3/4(1.91)

7(17.78)

Suction valve unloaders

(optional)

Appendix C—Outline dimensionsmodel t891 (single stage) with 103 mounting

Inches (Centim

eters)

31