Data Sheet

Bulletin 71.7:168
2


Type 68-2: Manual three-way switching valve
Type 168: Pneumatically operated three-way,
snap-acting switching valve with diaphragm
pressure range of 2 to 40 psig (0,14 to 2,8 bar)
or 2 to 60 psig (0,14 to 4,1 bar)
Type 168H: Pneumatically operated three-way,
snap-acting switching valve with diaphragm
pressure range of 35 to 100 psig (2,4 to 6,9 bar)
or 50 to 150 psig (3,4 to 10,3 bar)

(1)
See Table 1

(1, 2)
-10° to 150°F (-23° to 66°C)


g
: 7
 
1
: 35

3/32-inches (2,4 mm)

  • Mountingbracketsuitableforusewith2-inch
(51 mm) (nominal) pipestand
  • Controlvalveyokemountingparts
  • ManualResetswitch

1/4 NPT internal

Type 68-2: See Figure 3 for panel mounting
Types 168 and 168H: Can be mounted using two
tapped holes in the spring case, optional mounting
bracket (see Figure 4), or optional control valve
yoke mounting parts

Type 68-2: 0.5 pound (0,2 kg)
Type 168: 3 pounds (1 kg)
Type 168H: 5 pounds (2 kg)

 Aluminum
Dacron
®
covered with Nitrile (NBR)
 Stainless steel
Glass-llednylon(PA)with
polyurethane valve disks
 Stainless steel
Stem Bushing: Steel and
PolytetrauoroethylenePTFE
 Nitrile (NBR)
Actuator Spring: Steel
Valve Spring: Stainless steel
Trip Lever: Stainless steel
Plastic
1. The pressure/temperature limits in this bulletin or any applicable standard limitation should not be exceeded.
 2. ThistermisdenedinISAStandardS51.1-1979.
Dacron
®
isamarkownedbyE.I.duPontdeNemoursandCo.
Table 1. Maximum Pressures and Spring Color Codes



)


)





)


 
68-2 - - - - - - - - - - - - - - - - 150 (10,3) Unpainted
168-1
168-2
168-3
168-4
10
10
10
7
(0,69)
(0,69)
(0,69)
(0,48)
58
38
58
38
(4,0)
(2,6)
(4,0)
(2,6)
2 to 60
2 to 40
2 to 60
2 to 40
(0,14 to 4,1)
(0,14 to 2,8)
(0,14 to 4,1)
(0,14 to 2,8)
Green
Yellow
Green
Yellow
150
150
40
40
(10,3)
(10,3)
(2,8)
(2,8)
Unpainted
Unpainted
Yellow
Yellow
168H-1
168H-2
168H-3
168H-4
20
20
20
16
(1,38)
(1,38)
(1,38)
(1,10)
100
65
100
65
(6,9)
(4,5)
(6,9)
(4,5)
50 to 150
35 to 100
50 to 150
35 to 100
(3,4 to 10,3)
(2,4 to 6,9)
(3,4 to 10,3)
(2,4 to 6,9)
Green
Yellow
Green
Yellow
150
150
40
40
(10,3)
(10,3)
(2,8)
(2,8)
Unpainted
Unpainted
Yellow
Yellow