Valve Train Assemblies
Features
- The standard Kromschröder valve train uses VAS / VAD 1-3 solenoid valves and associated attachments
- Designed for 120 V AC operation, with options for 24 V DC or 230 V AC
- Includes a 12-44” WC high pressure switch and a 3-17” WC low pressure switch
Optional Components
- Pressure regulator
- Pressure gauges
- Test ports
- Pre-Wire
Pressure Rating
- 7.25 psi maximum with standard valve train
- 7 psi maximum with regulated valve train
Temperature Rating
- -4°F to 140°F (-20°C to + 60°C)
Component Agency Approvals

Helpful Tools
Specifications |
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Pipe Size NPT | Standard Part Number | Part Number with Regulator | Approximate Length inches (mm) | Capacity cfh Natural Gas | Pressure Drop @1 psi Inlet |
1/2" | KVTS 115 | KVTR 115 | 15.5 (394) | 350 | 1.6” WC (3.98 mbar) |
3/4" | KVTS 120 | KVTR 120 | 16 (406) | 600 | 2.2” WC (5.47 mbar) |
1” | KVTS 125 | KVTR 125 | 17 (432) | 1100 | 5.6” WC (13.94 mbar) |
1” | KVTS 225 | KVTR 225 | 19 (483) | 2000 | 6.0” WC (14.93 mbar) |
1-1/4” | KVTS 232 | KVTR 232 | 20 (508) | 2500 | 5.8” WC (14.43 mbar) |
1-1/2” | KVTS 240 | KVTR 240 | 21 (533) | 2750 | 5.8” WC (14.43 mbar) |
1-1/2” | KVTS 340 | KVTR 340 | 22.5 (572) | 4000 | 5.8” WC (14.43 mbar) |
2” | KVTS 250 | KVTR 250 | 22.5 (572) | 2800 | 5.8” WC (14.43 mbar) |
2” | KVTS 350 | KVTR 350 | 24 (610) | 4250 | 5.6” WC (13.94 mbar) |
Standard Valve Train Components |
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Pipe Size NPT |
Item 1 Manual Shutoff Valve |
Item 2 Automatic Shutoff Valve 1 |
Item 3 Automatic Shutoff Valve 2 |
Item 4 Low Pressure Switch 3-17” WC, 7.5 - 42.5 mbar |
Item 5 High Pressure Switch 12-44" WC, 30-110 mbar |
1/2" | AKT 15TN88 KS03152308 |
VAS, size 1 | VAS, size 1 | DG 40VCT1-6W KS74214174 |
DG 110VCT1-6W KS75454585 |
3/4" | AKT 20TN88 KS03152309 |
VAS, size 1 | VAS, size 1 | DG 40VCT1-6W KS74214174 |
DG 110VCT1-6W KS75454585 |
1” | AKT 25TN88 KS03152310 |
VAS, size 1 | VAS, size 1 | DG 40VCT1-6W KS74214174 |
DG 110VCT1-6W KS75454585 |
1” | AKT 25TN88 KS03152310 |
VAS, size 2 | VAS, size 2 | DG 40VCT1-6W KS74214174 |
DG 110VCT1-6W KS75454585 |
1-1/4” | AKT 32TN88 KS03152311 |
VAS, size 2 | VAS, size 2 | DG 40VCT1-6W KS74214174 |
DG 110VCT1-6W KS75454585 |
1-1/2” | AKT 40TN88 KS03152312 |
VAS, size 2 | VAS, size 2 | DG 40VCT1-6W KS74214174 |
DG 110VCT1-6W KS75454585 |
1-1/2” | AKT 40TN88 KS03152312 |
VAS, size 3 | VAS, size 3 | DG 40VCT1-6W KS74214174 |
DG 110VCT1-6W KS75454585 |
2” | AKT 50TN88 KS03152313 |
VAS, size 2 | VAS, size 2 | DG 40VCT1-6W KS74214174 |
DG 110VCT1-6W KS75454585 |
2” | AKT 50TN88 KS03152313 |
VAS, size 3 | VAS, size 3 | DG 40VCT1-6W KS74214174 |
DG 110VCT1-6W KS75454585 |
Valve Train with Optional Regulator Components |
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Pipe Size NPT |
Item 1 Manual Shutoff Valve |
Item 2 Automatic Shutoff Valve 1 |
Item 3 Regulator Valve 2** |
Item 4 Low Pressure Switch 12-44" WC, 30-110 mbar |
Item 5 High Pressure Switch 3-17” WC, 7.5 - 42.5 mbar |
1/2" | AKT 15TN88 KS03152308 |
VAS, size 1 | VAD, size 1 | DG 110VCT1-6W KS75454585 |
DG 40VCT1-6W KS74214174 |
3/4" | AKT 20TN88 KS03152309 |
VAS, size 1 | VAD, size 1 | DG 110VCT1-6W KS75454585 |
DG 40VCT1-6W KS74214174 |
1” | AKT 25TN88 KS03152310 |
VAS, size 1 | VAD, size 1 | DG 110VCT1-6W KS75454585 |
DG 40VCT1-6W KS74214174 |
1” | AKT 25TN88 KS03152310 |
VAS, size 2 | VAD, size 2 | DG 110VCT1-6W KS75454585 |
DG 40VCT1-6W KS74214174 |
1-1/4” | AKT 32TN88 KS03152311 |
VAS, size 2 | VAD, size 2 | DG 110VCT1-6W KS75454585 |
DG 40VCT1-6W KS74214174 |
1-1/2” | AKT 40TN88 KS03152312 |
VAS, size 2 | VAD, size 2 | DG 110VCT1-6W KS75454585 |
DG 40VCT1-6W KS74214174 |
1-1/2” | AKT 40TN88 KS03152312 |
VAS, size 3 | VAD, size 3 | DG 110VCT1-6W KS75454585 |
DG 40VCT1-6W KS74214174 |
2” | AKT 50TN88 KS03152313 |
VAS, size 2 | VAD, size 2 | DG 110VCT1-6W KS75454585 |
DG 40VCT1-6W KS74214174 |
2” | AKT 50TN88 KS03152313 |
VAS, size 3 | VAD, size 3 | DG 110VCT1-6W KS75454585 |
DG 40VCT1-6W KS74214174 |
**Outlet Pressure Ranges include: 2.5-25 mbar, 20-50 mbar, or 35-100 mbar. Range must be specified upon ordering. The valve train does not increase in length when ordered with the optional pressure regulator.
Valve Train with Additional Components |
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Valve Train with Pressure Gauges | ![]() |
Valve Train with Test Ports | ![]() |
Valve Train with Pressure Gauges and Pre-Wire | ![]() |