Flowserve FPS 14 User Manual

Gestra FPS 14

INSTALLATION

MAINTENANCE MANUAL

Operation

Maximum operating pressure: 150 psig

1. At the beginning of the cycle, the float ball (4.2) is at its lowest position. The vent valve (4.4) is open and the pressure valve (4.3) is closed.

2. The liquid to be pumped enters the pump tank by gravity through the inlet check valve. As the pump fills, the float ball (4.2) rises. The outlet check valve prevents back flow of liquid into the pump tank from the downstream side.

3. At the high trip point the mechanism snaps over center. The compressed coil spring (4.5) simultaneously closes the vent valve (4.4) and opens the pressure valve (4.3). The motive gas flows through the pressure valve (4.3) and pushes the liquid out of the pump tank though the outlet check valve. The inlet check valve prevents liquid from flowing back into the upstream piping.

4. As the liquid falls, the float ball (4.2) drops. At the low trip point, the mechanism snaps over center and the compressed coil spring (4.5) simultaneously opens the vent valve (4.4) and closes the pressure valve (4.3). The pump tank depressurizes as the motive gas is relieved through the vent valve.

5. After the pressure in the pump tank is relieved through the vent valve (4.4), flow resumes through the inlet check valve and a new cycle begins.

Installation

Consult the Installation Drawings for the proper piping configuration for your application. Please call GESTRA if you are not sure of the proper configuration.

1. CLEARANCE: Install the pump below the equipment to be drained. Proper clearance is required for the pump to fill. The clearance is the distance between the base of the pump and the bottom of the equipment to be drained. The FPS 14 and FPS 23 require a minimum clearance of 36”.

2. CHECK VALVES: Install the check valves on the pump tank, with gaskets, making sure the check valves are installed in the same direction. The flow direction has been stamped on each check valve and should match the flow arrow on the front of the tank.

a. Install lower flange bolts and secure with nuts and lock washers.

b. Place the check valve between the flanges from above onto the bottom bolts. Verify the

flow arrows are pointing in the correct direction.

c. Install and center the gaskets on both sides of the check valves.

d. Install the remaining flange bolts, nuts, and lock washers. Tighten evenly in a star pattern.

NOTE: The correct bolts for the different check valves are as follows:

1” RK16A (S.S.) 1/2”-13x3-1/2” (FPS-366) 1” RK44 (Bronze) 1/2”-13x3” (FPS-193) 2” RK16A (S.S.) 5/8”-11x4-1/2” (FPS-313) 2” RK44 (Bronze) 5/8”-11x6” (FPS-034) 3” RK16A (S.S.) 5/8”-11x6” (FPS-034) 3” RK44 (Bronze) 5/8”-11x5” (FPS-071)

e. Connect piping from discharge check valve flange to the condensate return line or other

discharge point

Full Port Isolation Valves are recommended on the pump inlet and outlet to allow the pump to be isolated for service.

Pressure Gauges are recommended upstream and downstream of the pump for accurate measurement of actual operating conditions.

NOTE: All isolation valves must be full port in order to achieve rated pump capacity.

3. MOTIVE GAS SUPPLY: Connect the motive gas supply (steam, air, or gas) to the ½” NPT connection “P” on the top of the cover flange. The motive gas supply line should have a strainer and a steam trap (GESTRA MK series for steam service) or liquid drainer trap (GESTRA UNA series for air or gas service) installed before the pump. See installation drawings for the proper piping of the components for the motive supply.

A Pressure Gauge should be installed on the motive gas supply to verify that there is sufficient motive gas pressure at the pump. If steam is being used, a siphon loop (pigtail) should be installed before the pressure gauge.

A Full Port Isolation Valve should be installed on the motive gas supply line to allow the pump to be isolated for service.

A Union or Flange should be installed between the isolation valve and the pump mechanism to allow for easy removal of the mechanism for service. This should be installed 14” or more above the cover flange, or in a horizontal plane outside of the O.D. of the cover flange, for easy removal.

NOTE: Motive gas pressure should be reduced to the minimum required to both overcome back pressure and high enough to provide necessary pump capacity.

NOTE: If the motive gas pressure exceeds 200 psig, a pressure-reducing valve (PRV) must be installed on the motive gas supply line to reduce the pressure to the pump. The PRV should be installed as far upstream as possible for optimum performance.

A Safety Relief Valve set at or below 200 psig, and a pressure gauge should be installed on the motive gas supply line to protect the pump should the PRV fail. These items should be installed downstream of the PRV, and upstream of the pump.

4. RESERVOIR / VENTED RECEIVER TANK: A reservoir or vented receiver tank is always required ahead of the pump. This is to prevent equipment flooding while the pump is in the discharge cycle. The actual requirement depends on the application and the type of installation. Please consult GESTRA if a reservoir or vented receiver is not existing, or has not been specified.

5. VENT LINE: Connect the vent line to the 1” NPT vent connection “V”. This vent line should be pipe to atmosphere, or back to the equipment to be drained. Application details will determine how the vent must be piped.

A Tee and Ball Valve should be installed in the vent line for troubleshooting purposes (See Installation Drawings). This is very important because it will allow troubleshooting of the vent and pressure valves without removing the mechanism from the tank.

A full port isolation valve should be installed on the vent line to allow the pump to be isolated for service.

If the vent line piping needs to be run more than 10 feet, the pipe size should be increased to greater than 1” in order to prevent restrictions which could reduce the capacity of the pump.

If the vent line is run horizontally, the piping should be pitched so as to be self-draining to prevent vapor lock.

NOTE: If condensate pressure from the equipment to be drained can exceed pump outlet pressure under normal operating conditions, a steam trap must be installed after each pump. This steam trap will prevent steam from blowing though the pump and entering the condensate return line. Consult GESTRA for the proper steam trap sizing and selection.

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