Walrus TQ200 - Adjusting the Pressure Switch

~ 5 ~
3. The activation pressure must be at least 10 psi below maximum pump pressure.
4. The maximum discharge pressure is NOT adjustable.
5. The flood suction performance table is as below:
Flooded Suction Performance Table
TQ200
Flow rateInlet pressure
(psi)
3 gpm 6 gpm 9 gpm 12 gpm 15 gpm
5
32
27 22 17 10
10
37 32 27 22 15
15
42 37 32 27 20
** 20
47 42 37 32 25
** 25
52 47 42 37 30
** Need to adjust pressure switch setting when inlet pressure is higher than the preset activation point
(TQ200 preset at 17 psi)
TQ400
Flow rateInlet pressure
(psi)
3 gpm 6 gpm 9 gpm 12 gpm 15 gpm 18 gpm
10
48 42 37 30 23 15
20
58 52 47 40 33 25
** 30
68 62 57 50 43 35
** 40
78 72 67 60 53 45
(TQ400 preset at 26 psi)
TQ800
Flow rateInlet pressure
(psi)
3 gpm 6 gpm 9 gpm 12 gpm 15 gpm 18 gpm 21 gpm
10
73 69 63 57 49 39 27
20
83 79 73 67 59 49 37
30
93 89 83 77 69 59 47
** 40
103 99 93 87 79 69 57
** Need to adjust pressure switch setting when inlet pressure is higher than the preset activation point
** Need to adjust pressure switch setting when inlet pressure is higher than the preset activation point
(TQ800 preset at 36 psi)
TQ1500
Flow rateInlet pressure
(psi)
10 gpm 20 gpm 30 gpm 40 gpm 50 gpm 60 gpm
10
63 59 55 48 39 27
20
73 69 65 58 49 37
30
83 79 75 68 59 47
40
93 89 85 78 69 57
TQ2200
Flow rateInlet pressure
(psi)
10 gpm 20 gpm 30 gpm 40 gpm 50 gpm 60 gpm
10
66 62 58 53 46 36
20
76 72 68 63 56 46
30
86 82 78 73 66 56
40
96 92 88 83 76 66
TQ3700
Flow rateInlet pressure
(psi)
10 gpm 20 gpm 30 gpm 40 gpm 50 gpm 60 gpm
10
80 75 70 65 59 49
20
90 85 80 75 69 59
30
100 95 90 85 79 69
40
110 105 100 95 89 79
~ 6 ~
+
-
Instructions for pressure adjustment (Fig. 5):
1. If pump does not start when tap is on, adjust
clockwise ("+") till it starts.
2. If pump does not stop when no water is
consumed, adjust counterclockwise ("-" ) till
it stops.
3. After adjustment is made, turn it on and off
several times to make sure it operates
normally.
TQ 200/400/800
Open the cover to adjust the pressure
XI. Adjust pressure switch
Adjust the pressure switch setting (according
to the pump models) as shown in Fig 5. Make
sure the system is primed.
The pump is supplied with a preset pressure in
the pressure switch. For most applications, it
will be satisfactory. In some cases a different
pressure may be required. This can be
achieved by following the instructions below.
However, it is highly recommended that the
adjustment is only done by the professional
personnel.