DIRECT ACTION PRESSURE REGULATORS
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1 DIRECT ACTION PRESSURE REGULATORS
2 DESCRIPTION 1. PRINCIPLE Our direct action pressure regulators are designed from two parts: A. a valve B. a control head Impulsion membrane B Springs Fitting nut Control guide Constant tightening stuffing box A Automatic centring and moving adjusting valve Valve body 2. WORKING Theses direct action pressure regulators have a simple architecture. The working doesn t require any adding energy. The control head (A part) receive the impulsion from the place where the pressure have to be regulated for example an autoclave The regulated pressure, Pr, act on the impulsion bellow (1), which depending to the valve mounting direction, it open or close the valve. The regulated pressure modification is obtained from the setting of the fitting nut (3). - The fluid close the valve : direct action - The fluid open the valve : reverse action - 2 -
3 CONSTRUCTION MATERIALS The standard type pressure regulators are designed in following materials. - Valve body and lids: Ft 25 D - Valve seats : Stainless steel Z20 C 13 - Control guide and Automatic centring and moving adjusting system: Stainless steel Z 2 CN Constant tightening stuffing box : brass - Stuffing box trimming: alternated ring and graphite flock - Control head : Ft 25 D - Metallic impulsion bellow : Stainless steel or tombac - Setting spring : Stainless steel mounted on stopping needle - Setting nut: Stainless steel Z 20 C 13 or galvanized steel ORIGINAL CARACTERISTICS 1. IMPULSION BELLOW The big diameter metallic impulsion bellow allow the admission of any no-corrosive fluids according to the following pressures and temperatures : Max pressure 2 bars Max temperature 130 C Tombac bellow Max pressure 10 bars Max temperature 180 C Stainless steel bellow 2. AUTOMATIC CENTRING AND MOVING ADJUSTING VALVE The joining between the valve and the control guide is realised by a knee and spring system which provide: - The valve auto-centring on seats - Elimination of any moving in the guide-valve joining
4 CARACTERISTIQUES ORIGINALES 3. CONSTANT TIGHTENING STUFFING BOX The graphite flock (1) is contained between two matrixes rings (2) with graphite strip. This block is under a metallic disc (3) is compressed by a spring in Stainless steel (4). The spring stretching is given by the stuffing box grain (5) it creates a constant tightening of the stuffing box trimming. A gorge with oil retention is created in the stuffing box grain and gives a permanent lubricant of the control guide (6) in the stuffing box. STANDARD TYPES BUILD 1. RP 201 D RP 201 I TYPES SINGLE SEATS - RP 201 D Direct function Closing by pressure increasing - RP 201 I Reverse function Opening by pressure increasing Ø Pv CV Max The Pv which entering in the control head. The Pv values from the table correspond to a 1bar Pv
5 STANDARD TYPE OVERALL DIMENSIONS 2. RP 202 D RP 202 I TYPES DOUBLE SEATS - RP 202 D Direct function closing with pressure increasing - RP 202 I Reverse function Opening with pressure increasing Ø Pv CV Max RP 203 D RP 203 I TYPES 3 ways - RP 203 D Function: Mixing - RP 203 I Function: Dispenser Ø Pv CV Max NOTA Upper types are deigned to set Pr pressure over than 0,1bar. 4. WITH "C" EQUIPMENT TYPES All upper seen regulators could be provided with the "C" equipment. This equipment consist in a control head with a membrane neoprene armed with nylon, it s a big diameter, this pack is created for Pr pressure low than 0,1bar, which have to be set with precision. The control head get a strangling settable screw in order to never have a pumping effect
6 STANDARD TYPE OVERALL DIMENSIONS 1. RP 201 ET RP 202 TYPES D and I A B Cft Cac D E F weight Cft cast iron body Cac cast steel body 2. RP 203 TYPES D and I A B Cft Cac D E F weight Cft cast iron body Cac cast steel body 3. EQUIPEMENT «C» A B Cft Cac D E F weight Cft cast iron body Cac cast steel body - 6 -
7 OPTIONS FOR PRESSURE REGULATORS 1. parabolic profile valve 2. stuffing box in Stainless steel Z20 C stuffing box in Stainless steel Z2 CN tight stuffing box bellow in stainless steel Z 2 CN 18-10: brass box Stainless steel Z 2 CN box Control guide Stuffing box plug Plug joint Stuffing box bellow Stuffing box case Stuffing box piston Valve guide Stuffing boxes with bellow are adapted to 6 bars maximum pressure OTHER STANDARD ORDERS - Regulator equipped with : Valve body in cast steel Valve body in stainless steel Valve body on bronze - Bridles corresponding to special norms SPECIALES ORDERS - Vacuum regulators: pressure regulators could be considered as vacuum regulator. For this ordering, please contact us
8 EXEMPLE D APPLICATION 1. AUTOCLAVE EQUIPMENT WITHOUT ANTI AIR PRESSURE 1. RP 202 D on the steam entry used as temperature regulator 2. RP 202 I on the way out 3. Isolation valves on steam entry 4. By-pass valves on steam entry 5. By-pass valves on cooling water entry 6. No return valve 7. Stopping valve on the way out 8. By pass valve on the way out 9. Manual draining valve 10. Diffuser 11. Thermometer 12. Emptying valve 13. manometer 14. surety valve 15. electric control valve on steam entry 16. Thermometer recorder 17. manometer recorder 18. timer A Steam entry B water cooling entry C way out D Draining - 8 -
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