Throttle Valve with Flow Adjusting Dial
| Controlled Port | Type | Model |
| A | Meter Out | HF3H-A-40SK-025B |
| Meter In | HF3H-AY-40SK-025B | |
| B | Meter Out | HF3H-B-40SK-025B |
| Meter In | HF3H-BY-40SK-025B | |
| A/B | Meter Out | HF3H-W-40SK-025B |
| Meter In | HF3H-WY-40SK-025B | |
| P | – | HF3H-P-40S-025B |
| R | – | HF3H-R-40S-025B |