Instructional Manual NTAPILKBP0310 Feburary 2004
K1000-K3000 Piloting system
INTRODUCTION
CHARACTERISTICS
The FRANCEL piloting system consists of a pre-expansion relay, a pilot relay and a block pilot . Modification of the set point range is achieved by simply changing the pilot relay and pre-expansion relay manometric boxes. This exchange does not require a disassembly tool.
Inlet pressure Outlet pressure Temperature
Pe Pa TS
25 bar 0.010 to 16 bar - 20 to 60 °C
SETTING RANGES, MANOMETRIC BOXES, RELIEF VALVE Pa (bar) Nominal
Range
0.020 0.100 0.300 1.000 2.000 4.000 8.000 16.000
0.01 to 0.05 0.05 to 0.18 0.18 to 0.77 0.77 to 1.20 1.20 to 2.40 2.40 to 4.80 4.80 to 10.50 10.50 to 16.00
Pre-expansion relay PS Wire Ø Type Size (bar) (mm) 114
10
Type
4.5
Size
PS (bar)
162
5
5.5
Diaphragm 71 Bellows
Pilot
236
20 35
4.5 5.5
Diaphragm
6.5
(1) Nota : If the Pe <= 10 bar and Pa <= 8 bar, the relief valve is removed and replaced by a plug.
114
10
71
20
Wire Ø (mm) 2.0 3.0 4.0 4.5 5.5 6.5 5.5 6.5
Manometer Range (bar)
Relief valve (1) Max. set pt Setting (bar) (bar)
0-4
5 20
0 - 16 0 - 40
7 13 18 O28
DESCRIPTION 1 2 3 4 5 6
-
Pilot manometric box (pre-expansion relay) Pilot manometric box (pilot) Pilot body Nozzle (pre-expansion relay) Nozzle (pilot) Connector for exterior manometer (1/4 NPT)
OPERATION The regulator opens by increasing the modulated pressure. OPENING As the flow increases, the outlet pressure ( Pa) decreases on the pilot impulse element (9). Due to the action of the set point springs (7), the pilot (2) then the pre-expansion relay ( 1) open. The pressure of the pre-expansion relay ( Pd) supplies the pilot. The modulated pressure ( Pm) is supplied to the actuator regulation diaphragm (8) by the pilot. The regulator OPENS.
O30
The force of the pressure on the pilot impulse element is overcome by that of the set point springs (7), the pilot (2) and then the pre-expansion relay ( 1) close. The modulated pressure ( Pm) decreases through the pilot reject (RP). The regulator CLOSES.
CLOSING
22/04/2005
As the flow decreases the outlet pressure ( Pa) increases on the pilot impulse element (IP).
www.francel.com 1