ContactInformationHome Page
Valves Steam Traps Level Controls (Liquids) Trefolex Cutting Compound KTR Couplings Level Controls (Dry Products) Boiler Controls Firetex Pipe Penetration Seals Bestobell Cryogenic Valves Bestobell Constaflo and Truflo
3A/GM3/6A/GM6 Steam Traps

Features

  • Single blade element
  • Stainless steel internals
  • Built in strained & check valve
  • Modulating discharge
  • Continuous air & CO2 venting
  • Fast start up capabilities
  • No loss of live steam

Description

3A/GM3 Max Differential pressure - 330 PSI
6A/GM6 Max Differential pressure - 70 PSI

Line sizes  
Model 3A 3/8", 1/2", 3/4"
Model GM3 1/2", 3/4", 1", 1 1/4", 1 1/2", 2"
Model 6A 3/8", 1/2", 3/4"
Model GM6 1/2", 3/4", 1", 1 1/4", 1 1/2"
End connections threaded (BSP, NPT) socket weld flanged
   
Materials  
Body & Cover: Forged carbon steel
Valve Seat: Stainless steel
Valve Cone: Stainless steel
Bimetal: Stainless steel
Strainer: Stainless steel
Gasket: Flexible graphite
   
Mounting
From horizontal to vertical. Self draining and freeze resistant when mounted in vertical position.
 

Operation

On initial start up the steam system, large amounts of cold condensate and air are present in the system. At this point the bimetallic strip of the delta element relaxes and fully opens the valve assembly to quickly expel the high volume of non-condensate gases and cold condensate through the discharge port.

As the element senses an increase in the condensate temperature the bimetal expands and raises the stem to modulate the flow. Just below the temperature of saturated steam the seat will close tightly to prevent live steam from discharging.

Application

For fast start up and modulating discharge on process and heating, applications with differential pressures up to 70 PSI, this series of traps is designed to handle the varying conditions found in process applications with condensate loads ranging from light to heavy.
Dimensions

3A
Size
A
B
C
D
E
Wt
3/8"
4"
5"
3 1/4"
3 1/8"
2 1/4"
5.5lb
1/2"
4"
5"
3 1/4"
3 1/8"
2 1/4"
5.5lb
3/4"
4"
5"
3 1/4"
3 1/8"
2 1/4"
5.5lb
   
GM3
Size
A
B
C
D
E
Wt
1/2"
4"
5"
3 1/4"
3 1/8"
2 1/4"
5.5lb
3/4"
4"
5"
3 1/4"
3 1/8"
2 1/4"
5.5lb
1"
5"
6 3/4"
3 5/8"
4"
3/14"
9.9lb
1 1/4"
7 1/8"
9 1/2"
5 7/8"
6"
4 3/8"
33lb
1 1/2"
7 1/8"
9 1/2"
5 7/8"
6"
4 3/8"
33lb
2"
10 7/8"
13 7/16"
6 3/4"
4 9/16"
N/A
70lb
   
6A
Size
A
B
C
D
E
Wt
3/8"
4"
5"
3 1/4"
3 1/8"
2 1/4"
5.5lb
1/2"
4"
5"
3 1/4"
3 1/8"
2 1/4"
5.5lb
3/4"
4"
5"
3 1/4"
3 1/8"
2 1/4"
5.5lb

GM6
Size
A
B
C
D
E
Wt
1/2"
4"
5"
3 1/4"
3 1/8"
2 1/4"
5.5lb
3/4"
4"
5"
3 1/4"
3 1/8"
2 1/4"
5.5lb
1"
5"
6 3/4"
3 5/8"
4"
3 1/4"
9.9LB
1 1/4"
7 1/8"
9 1/2"
5 7/8"
6"
4 3/8"
33lb
1 1/2"
7 1/8"
9 1/2"
5 7/8"
6"
4 3/8"
33lb
2"
10 7/8"
13 7/16"
6 3/4"
4 9/16"
N/A
70lb
 

Capacity charts: Condensate Capacity (1b/hr Pressure Differential PSI)

3A
Size
PSI Differential
2
5
10
15
20
25
30
3/8"
1/2"
3/4"
Cold start up
500
1000
1800
2200
2600
2900
3000
Hot
175
200
200
200
200
200
200
 
6A
Size
PSI Differential
2
5
10
15
20
25
30
3/8"
1/2"
3/4"
Cold start up
1200
1900
2500
2900
3300
3800
4000
Hot
130
160
190
200
210
220
230
 
GM3
Size
PSI Differential
2
5
10
15
20
25
30
1/2"
Start up
1000
1700
2100
2500
2900
3000
3200
3/4"
*Hot
500
700
750
750
750
750
750
1"
Start up
Hot
1800
700
3200
950
5100
1300
6900
1600
8000
1700
8900
1800
9000
2000
1 1/4"
Start up
4000
7000
10000
13000
16000
18000
20000
1 1/2"
Hot
2400
2800
3200
3700
3900
4000
4100
2"
Start up
Hot
13000
5000
20000
6300
30000
7500
35000
8500
40000
9000
45000
10000
50000
11000
 
GM6
Size
PSI Differential
2
5
10
15
20
25
30
1/2"
Start up
1800
3000
3800
4650
5200
5800
6200
3/4"
*Hot
580
700
760
820
860
880
900
1"
Start up
Hot
3500
1100
6400
1340
8100
1520
8900
1590
9400
1650
9600
1700
9800
1750
1 1/4"
Start up
8000
14000
18000
21000
23000
25000
26000
1 1/2"
Hot
3100
3350
3550
3700
3800
3850
3900
2"
Start up
Hot
15000
3100
25000
6000
31000
7200
36000
8000
42000
8500
44000
8900
46000
9200
 
Products Enquiry
Please Email us with any requirements you have regarding this product

Note: All fields need filling in correctly.

Please Enter your Name your Email Address and your Product Enquiry

Your Name:
Your Email Address:
Product Enquiry: