ALTERNATIVE FUEL SYSTEMS, INC.

CONVERTERS / VAPORIZERS / REGULATORS

See Fuel Systems page for correct application

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Part Number

Secondary Spring

Primary Pressure

Secondary Opening Pressure

Diaphragm

Primary ValveType

Inlet Pressure

Temperature Range

Horsepower Rating

Coolant Inlet / Outlet-NPT

Fuel Inlet NPT

Primary Test Port  NPT

Vapor Outlet NPT

Balance Vent NPT

Repair Kit

JB

Blue

1.5 P.S.I.

- 1.5" W.C.

Hydrin

Spring Bar-Flat seat

30 - 312 P.S.I.

-40°F  +250°F

5 - 100

3/8"

1/4"

1/8"

1/2"

1/8"

RK-J

JB-2

Blue

1.5 P.S.I.

-1.5" w.c.

Silicone

Spring Bar-Flat seat

30 - 312 P.S.I.

-40°F  +250°F

5 - 100

3/8"

1/4"

1/8"

1/2"

1/8"

RK-J-2

JO

Orange

1.5 P.S.I.

-.5" W.C.

Hydrin

Spring Bar-Flat seat

30 - 312 P.S.I.

-40°F  +250°F

5 - 100

3/8"

1/4"

1/8"

1/2"

1/8"

RK-J

COBRA

Blue

1.5 P.S.I.

- 1.5" W.C.

Fluorosilicone

Pin / Oring Steel Stop

30 - 312 P.S.I.

-40°F  +250°F

5 - 100

3/8"

1/4"

1/8"

1/2"

1/8"

RK-COBRA

CB-30177

Blue

1.5 P.S.I.

- 1.5" W.C.

Fluorosilicone

Pin / Oring Steel Stop

30 - 312 P.S.I.

-40°F  +250°F

5 - 100

3/8"

1/4"

1/8"

1/2"

1/8"

RK-COBRA

EB

Blue

1.5 P.S.I.

- 1.5" W.C.

Hydrin

Spring Bar-Flat seat

30 - 312 P.S.I.

-40°F  +250°F

200

3/8"

1/4"

1/8"

1"

1/8"

RK-EB

EB-2

Blue

1.5 P.S.I.

- 1.5" W.C.

Silicone

Spring Bar-Flat seat

30 - 312 P.S.I.

-40°F  +250°F

200

3/8"

1/4"

1/8"

1"

1/8"

RK-EB-2

LB

Blue

1.5 P.S.I.

- 1.5" W.C.

Hydrin

Spring Bar-Flat seat

30 - 312 P.S.I.

-40°F  +250°F

50 - 325

3/8"

1/4"

1/8"

1"

1/8"

RK-L

LB-2

Blue

1.5 P.S.I.

- 1.5" W.C.

Silicone

Spring Bar-Flat seat

30 - 312 P.S.I.

-40°F  +250°F

50 - 325

3/8"

1/4"

1/8"

1"

1/8"

RK-L-2

 With the exception of the JO, the model "J" converters and COBRA style converters are interchangeable for most applications. The main difference between the "J" and the COBRA, is the primary valve. All J models incorporate a flat rubber seat bonded to a steel spring bar. This flat seat closes off the primary orifice when the pressure reaches 1.5 P.S.I. In the event of over pressurization, due to contamination or freezing, the flat seat may become damaged causing converter failure. The flat seat and spring were replaced by a pin and o-ring arrangement in the COBRA style converters. A steel ring was also machined into the pin. This ring contacts the primary orifice in an over pressurization situation. This prevents damage to the o-ring. The COBRA style converters offer superior resistance to primary valve failure. The standard diaphragm used in COBRA converters are Fluorosilicone.  This material is much more resistant to damage from impurities in propane.

The CB-30177, while being appropriate for any application where a JB is used, was designed for closed loop systems. This converter is based on the COBRA. The differences are closer tolerances of the internal components for more consistent fuel control, and a second threaded opening in the secondary cover. The unused opening in this cover may be plugged. At least one of these openings must remain open for proper operation. If venting to the atmosphere, it is preferable to leave the port in the 3:00 o'clock position open with an S7-1 screen.

 The optional silicone diaphragms for LP components offer more resistance to damage from exposure to propane, and it's inherent impurities. Silicone is also a lighter material than hydrin. This lighter weight helps improve the response time of the secondary valve.

AFS Recommends the use of a thermostat on all converters to maintain consistent fuel temperature and prevent premature failure.

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Part Number

Primary Pressure

Secondary Pressure

Maximum Inlet Pressure

Temperature Range

Horsepower Rating

Vacuum Lockoff

Idle Adjust

Primer

Fuel Type

Coolant Inlet / Outlet

Fuel Inlet

Vapor Outlet

Vacuum Port

T60

4.5 P.S.I.

-.5" W.C.

250 P.S.I.

-40°F-+250°F

60

Yes

Yes

No

Liquid

1/4 NPT

1/4 NPT

3/8 NPT

1/8 NPT

T60-B

4.5 P.S.I.

-.5" W.C.

250 P.S.I.

-40°F-+250°F

60

Yes

Yes

Yes

Liquid

1/4 NPT

1/4 NPT

3/8 NPT

1/8 NPT

T60-C

4.5 P.S.I.

-.5" W.C.

250 P.S.I.

-40°F-+250°F

60

No

No

Yes

Liquid

1/4 NPT

1/4 NPT

3/8 NPT

1/8 NPT

T60-E

4.5 P.S.I.

-.5" W.C.

250 P.S.I.

-40°F-+250°F

60

No

Yes

No

Liquid

1/4 NPT

1/4 NPT

3/8 NPT

1/8 NPT

120A

5 p.s.i.

250 P.S.I.

150

Yes

Yes

No

Liquid

1/4 NPT

1/4 NPT

1/2 NPT

1/8 NPT

PRESSURE REDUCTION VALVES

For Natural gas applications.

May also be used for vapor propane applications be removing spring, and mounting upside down.