Model L1220A

Pipe-Away

Use the L1220A to pipe away vapors in pressure and vacuum relief systems. The L1220A routes vapors through a flanged outlet connection, providing increased fire protection and safety.

  • LaMOT Valve & Arrestor’s proprietary “cushioned air” seating
  • High-performance fluoropolymer seating diaphragms come standard, minimizing sticking caused by resinous vapors and atmospheric moisture
  • Self-draining housing body and drip rings protect seating surfaces from condensate and freezing
  • Prevents dangerous pressure or vacuum buildup due to binding or clogging of the valve
  • Peripheral guiding and center stabilizing system ensure the proper alignment of seating surfaces

Sizes: 2″ (DN 50) – 12″ (DN 300)

Material: available in aluminum, carbon steel, stainless steel, fiberglass and other materials

Pressure: 0.5 oz/in2 – 15 psig

Vacuum: 0.5 oz/in2 – 12 psig

Inlet
Fig
(Metric)
Outlet
Fig
(Metric)
Max. Set
Pressure
Weight
Loaded
Max. Set
Vacuum
Weight
Loaded
Max.
Setting
Spring
Loaded
Max.
Setting
Weight
Loaded
Max.
W.P.
for Min.
Vacuum
Setting
Min. Vac.
Setting
for
Max.
W.P.
2″

(50 mm)

3″

(76 mm)

11 oz/in2

(48.2 gm/cm2)

12 oz/in2

(52.7 gm/cm2)

15 psig SPRING LOADED PRESSURE
(1.05 kg/cm2)
12 psig SPRING LOADED VACUUM
(0.84 kg/cm2)
*0.5 oz/in2 WEIGHT LOADED
(2.20 gm/cm2)
See TPD
for Vacuum
Settings and
MAWP
3″

(80 mm)

4″

(102 mm)

13 oz/in2

(57.0 gm/cm2)

11 oz/in2

(48.3 gm/cm2)

4″

(100 mm)

6″

(152 mm)

16 oz/in2

(70.3 gm/cm2)

11 oz/in2

(48.3 gm/cm2)

6″

(150 mm)

8″

(203 mm)

16 oz/in2

(70.3 gm/cm2)

16 oz/in2

(70.3 gm/cm2)

8″

(200 mm)

10″

(254 mm)

16 oz/in2

(70.3 gm/cm2)

16 oz/in2

(70.3 gm/cm2)

10″

(250 mm)

12″

(305 mm)

16 oz/in2

(70.3 gm/cm2)

16 oz/in2

(70.3 gm/cm2)

12″

(300 mm)

14″

(356 mm)

16 oz/in2

(70.3 gm/cm2)

16 oz/in2

(70.3 gm/cm2)

A
length
(Metric)
B
Height
(Metric)
C
Width
(Metric)
D

(Metric)

E

(Metric)

Approx.
Ship
Wt. Lbs.
(Aluminum)
14.25″

(362 mm)

12.62″

(321 mm)

7.50″

(191 mm)

7″

(178 mm)

5.50″

(140 mm)

26

(12 kg)

18″

(457 mm)

15.12″

(384 mm)

9″

(229 mm)

8.12″

(206 mm)

6″

(152 mm)

34

(16 kg)

19.25″

(489 mm)

18.25″

(464 mm)

11″

(279 mm)

9.50″

(241 mm)

6.50″

(165 mm)

49

(22 kg)

26.50″

(673 mm)

23.75″

(603 mm)

13.50″

(343 mm)

12.75″

(324 mm)

8.50″

(216 mm)

93

(42 kg)

32.50″

(826 mm)

28.50″

(724 mm)

16″

(406 mm)

15.25″

(387 mm)

10.75″

(273 mm)

137

(62 kg)

37.75″

(959 mm)

34.50″

(876 mm)

19″

(483 mm)

18″

(457 mm)

12.50″

(3182 mm)

186

(85 kg)

42.75″

(1086 mm)

39.12″

(994 mm)

21″

(533 mm)

20.62″

(524 mm)

15″

(381 mm)

260

(118 kg)

Specifications subject to change without notice. Certified dimensions available upon request.

† W.P. = Working Pressure. On spring loaded valves, change model number. ‡ 150# R.F. drilling compatibility F.F. on aluminum and R.F. on carbon steel and stainless steel alloys. Fiberglass dimensions on request. 16 oz/in2 set with spacer. SS set weights-consult factory. *Some sizes require non-ferrous components to achieve 0.5 oz/in2 setting.

  • Buna-N, fluoropolymer, FKM and other seating diaphragms
  • Steam jacket
  • Spacer

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