Throttle Valve for T-10® Bypass on
HP PROTECTUS® III Fire Service Meters
OVERVIEW:
The throttle valve is used in the 4”, 6”, 8”, and 10” HP PROTECTUS® III with a T-10® bypass.
HP PIII Size
4"
6"
8"
10"
T-10 Size on
Bypass
1"
1 1/2"
2"
2"
Corresponding Throttle
Valve
11668-000
11668-100
11668-200
11668-200
The throttle valve is located behind the measuring chamber inside the T-10 on the bypass.
Below is a picture of the throttle valve.
The throttle valve slides right into and fits in the outlet of the T-10 meter on the bypass.
PSD THROTTLE VALVE 08.15 © Copyright 2015, Neptune Technology Group Inc. Neptune is a registered trademark of Neptune Technology Group Inc.
FUNCTION:
 The spring loaded throttle valve will compress as the flow rate through the HP PROTECUTS III
increases.
 When this happens the throttle valve regulates the amount of flow moving through the T-10
bypass according to the following chart:
T-10 Size on
HP PIII Size
Regulated T-10 Flow Rate
Bypass
4"
1"
10 GPM
6"
1 1/2"
15 GPM
8"
2"
20 GPM
10"
2"
20 GPM


This serves two purposes.
o It protects the T-10 from seeing excessive flow.
o It also forces more water through the turbine side to move the meter through cross over.
If you do not operate the meter with a throttle valve:
o You run the risk of over running the T-10 and prematurely wearing out the T-10 bypass.
o You will affect where/when the meter enters crossover.
PART NUMBER AND ORDERING:
 We do sell T-10 meters with the throttle valve already installed. The meter part numbers are:
T-10 Size on
T-10 with Throttle Valve as
HP PIII Size
Bypass
Assembly
4"
1"
12001-000
6"
1 1/2"
12001-100
8"
2"
12001-200
10"
2"
12001-200




Note: The T-10 with a throttle valve in it is not tested.
o This is because the throttle valve regulates the flow rate below the upper end.
Before the throttle valve is put in the T-10, the T-10 gets tested to make sure it is operating
properly.
The meter does not come with a register on it. The register will have to be purchased separately.
The part number for the registers is covered on the register end number print. The part number is
RX8XXX.
SUMMARY:
 The customer should not operate the HP PROTECUTS III without the throttle valve installed in the
T-10 on the bypass.
o The T-10 runs the risk of being damaged.
o The crossover will be altered.
 The throttle valve is only present on units with a T-10 bypass.
 We do sell meters that have the throttle valve already installed.
 We do sell throttle valves as individual components for the customer to install themselves.
PSD THROTTLE VALVE 08.15 © Copyright 2015, Neptune Technology Group Inc. Neptune is a registered trademark of Neptune Technology Group Inc.