Regenerative Turbine Pumps should never be operated at no-flow, or “shut-off” conditions. In systems where pumps may exceed the pump or system design operating pressure, it is highly recommended that a Pressure Relief Valve or other protective device be installed in the discharge line. This will relieve excess pressure and prevent motor overload or pump failure in the event of restricted flow conditions. Another more sophisticated option is to use a VFD (variable frequency drive) with a closed-loop pressure transducer feedback loop. This equipment will allow the automatic adjustment and limiting of motor RPM to maintain a given pressure. MTH provides both relief valves and VFD’s for use with its pumps, as optional purchased accessories.
VALVE SIZE |
AA |
BB |
CC |
INLET SIZE |
OUTLET SIZE |
1/2" |
5 13/16 |
2 1/8 |
1 9/32 |
1/2" |
3/4" |
3/4" |
5 15/16 |
2 5/16 |
1 13/32 |
3/4" |
1" |
1" |
6 31/32 |
2 27/32 |
1 3/4 |
1" |
1 1/4" |
1 1/4” |
8 5/16 |
3 1/2 |
2 |
1 1/4" |
1 1/2” |
1 1/2” |
9 1/2 |
3 5/8 |
2 3/16 |
1 1/2” |
2” |
Water Capacity in Gallons per minute (GPM) at 25% Over Pressure
SET PRESSURE |
SEAT SIZE - Inches | |||||||
1/2 | 3/4 | 1 | 1 1/4 | 1 1/2 | 2 | 2 1/2 | 3 | |
5 | 2.8 | 3.9 | 7.7 | 12 | 17 | 22 | 33 | 44 |
10 | 3.9 | 5.6 | 8.1 | 17 | 24 | 31 | 46 | 62 |
15 | 4.8 | 6.8 | 13 | 21 | 29 | 38 | 56 | 76 |
20 | 5.5 | 7.9 | 15 | 24 | 34 | 44 | 65 | 88 |
25 | 6.2 | 8.8 | 17 | 27 | 38 | 49 | 73 | 98 |
30 | 6.8 | 9.7 | 19 | 29 | 41 | 53 | 80 | 107 |
40 | 7.7 | 11 | 22 | 34 | 48 | 62 | 92 | 124 |
50 | 8.4 | 12 | 24 | 38 | 53 | 69 | 103 | 139 |
75 | 10.5 | 15 | 30 | 47 | 65 | 85 | 126 | 170 |
100 | 12 | 18 | 34 | 54 | 76 | 98 | 146 | 196 |
110 | 13.3 | 19 | 36 | 56 | 79 | 102 | 153 | 206 |
125 | 14 | 20 | 38 | 60 | 85 | 109 | 163 | 219 |
150 | 15.4 | 22 | 42 | 66 | 93 | 120 | 178 | 240 |
175 | 16.1 | 23 | 45 | 71 | 100 | 129 | 193 | 259 |
200 | 17.5 | 25 | 48 | 76 | 107 | 138 | 206 | 277 |
250 | 19.6 | 28 | 54 | 85 | 120 | 154 | 230 | 310 |
300 | 21.7 | 31 | 59 | 93 | 131 | 169 | 252 | 340 |