Normal Safety Valves with spring loading. (AN) Model 295 and 296

Transcription

1 GB-1 EN Model 295 Model 296 Thread connection Flange connection The valve works as an automatic pressure releasing regulator activated by the static pressure existing at the entrance to the valve and is characterized by its ability to open, at the first proportional to the pressure increase, and after instantly and totally. Design in accordance with nternational Standard SO 126-1:0 Safety Valves. n accordance with the requirements of directive 97/23/EC. EC valve verification certified by: TÜV nternacional Grupo TÜV Rheinland, S.L. EC Type (Module H1) EC examination report nº certified by: TÜV nternacional Grupo TÜV Rheinland, S.L. n compliance with the ATEX 9/9/CE directive Protective equipment and systems for use in potentially explosive atmospheres. Other authorisations: SCR, T, NASTHOL,...etc. Specifications Model open cap with lever. Model closed cap without lever. 90 angular flow. Activated by direct action helicoid spring. Simplicity of construction ensuring minimum maintenance. Materials carefully selected for their resistance to corrosion. nternal body designed to offer favourable flow profile. Seat and sealing disk balanced, making them extremely tightness, even exceeding DN-3230 requeriments. Page 3. Great discharge capacity. Deflector nut designed to make easier the steam expansion, a sudden opening and to measure the blowdown of any fluid. Guarantees absolute opening and closing precision. Equipped with draining screws for removing condensation. Orientation of the lever by rotation. All the valves are supplied sealed at the set pressure requested, simulating operational conditions, and are vigorously tested. All components are numbered, registered and checked. f requested in advance, material, casting, test and efficiency certificates will be enclosed with the valve, and the instruction manual, in accordance with P.E.D. 97/23 EC. Tel.: Fax:

2 GB-2 MPORTANT 1.-, seals,... etc., achieving leakage levels less than: Pa cm3 3 0,3x10 sec. The ranges of application allow certain flexibility although we recommend limiting them to: FLUD Saturated steam Liquids and gases SEALS S V T RANGE OF PLCATONS OF THE SEALS SET PRSURE 1,5 3,5,0 8,0,0 S V T S V T TEMPERATURE N C ACCORDNG TO MANUFACTURERS RECOMMENDED MNMUM MAXMUM MNMUM MAXMUM (1) (1) For temperatures exceeding 230 C apply metalic seal only. Depending on demand: Buna-nitryls seals, Butyl, Natural rubber, E.P.D.M., Chlorosulphonate polyethylene (Hypalon), Neoprene, etc. Seal metal by metal. Electrical contact indicating open/closed. Other connections. Possibility of manufacture in other types of material, for special operating conditions (high temperatures, fluids, etc.). Totally free of oil and grease, to work with oxygen, avoiding possible fire risks (UV-Oxygen-VBG62). N. PECE PECE BRONZE MATERAL CARBON STEEL STANLS STEEL 1, , Body Bell Lever Cap Hollow screw Hollow screw nut Rod Ring (5) Lead Plug Deflector Stud Sealing nut Cap Safety ring () Seal Sealing disk Spring press Spring Clip Joint Washer Bronze (EN-CC91K) Bronze (EN-CC91K) Stainless steel (EN-1.301) (1) Stainless steel (EN-1.301) Stainless steel (EN-1.310) Plastic Stainless steel (EN-1.310) Stainless steel (EN-1.310) Carbon steel (EN ) Carbon steel (EN ) Stainless steel (EN-1.301) Carbon steel (EN ) (2) Stainless steel (EN-1.305) Stainless steel (EN-1.305) Stainless steel (EN-1.301) Stainless steel (EN-1.310) Plastic Stainless steel (EN-1.301) Stainless steel (EN-1.310) Stainless steel (EN-1.310) Stainless steel (EN-1.08) Stainless steel (EN-1.08) Stainless steel (EN-1.301) Stainless steel (EN-1.305) (3) Stainless steel (EN-1.305) Stainless steel (EN-1.305) Stainless steel (EN-1.301) Stainless steel (EN-1.310) Plastic Stainless steel (EN-1.301) Stainless steel (EN-1.310) Stainless steel (EN-1.310) 1/2" x 1" a 1 1/" x 2" x a PN PMS. bar OPERATNG CONDTONS PRSON MAX. TEMP. N C MN. TEMP. N C (1) From R. 1 x 1 1/2 / DN- x 0 in Bronze (EN-CC75S-GM). (2) From R. 1 x 1 1/2 / DN- x 0 in Carbon steel (EN ). (3) From R. 1 x 1 1/2 / DN- x 0 in Stainless steel (EN-1.08). () From R. 1 x 1 1/2 / DN- x 0. (5) Stainless steel (EN-1.568) for R. 1/2 x 1 / DN- x. Stainless steel (EN-1.310) for R. 3/ x 1 / DN-. Tel.: Fax:

3 GB-3 Model 295 Model 296 Tel.: Fax:

4 GB- DSASSEMBLY AND ASSEMBLY 1 Disassembly To replace the spring (), or clean any of the internal components of the valve, proceed in the following manner: A Withdraw the clip (21), using a punching tool, and lift the lever (3). B Unscrew the cap () and remove. C Holding the rod (7) (2) steady, loosen the hollow screw nut (6), until the constructive limit, and the hollow screw (5) until you note a releasing of the spring (). D Unscrew the bell (2) holding the rod (7) (2) and the body (1) () steady. E Lift the bell (2) and you will have access to all the components. 2 Assembly A Enter the bell (2) and the joint (22) through the upper part of the rod (7) (2). B Turn the bell (2) holding the rod (7) (2) and the body (1) () steady. C Replace the hollow screw (5) with the hollow screw nut (6). D Adjust the set pressure with the hollow screw (5) and fix the adjustment position with the hollow screw nut (6). E Change the washer (23) and lightly tighten the cap (). F Place the lever (3) and fix it with the clip (21). ADJUSTNG THE SET PRSURE A Proceed according to DSASSEMBLY A, B, C. B Proceed according to ASSEMBLY D, E, F. ADJUSTEMENT OF THE BLOWDOWN A Slack the stud (12). B Twist or untwist the deflector (11) according the difference in the wished locking pressure (blowdown). C Fix the deflector position screwing the stud (12). WARNNG n case to do the change of the sealing disc () make sure that the surface of this as well as the one of the seat into the body (1) () the correctly rectified and free of impurities. SET PRSUR MAXMUM (LQUDS AND GAS) MAXMUM (SATURATED STEAM) MNMUM STEAM AND GAS LQUDS (1) SET PRSUR AND REGULATNG RANG 1/2" x 1" x 3/" x 1 1/" 1" x 1 1/2" x 0 1 1/" x 2 0 to 0,70 CODE to 1,60 CODE ,0 to 3,50 CODE ,00 to 5,50 CODE ,00 to 10,00 CODE ,00 to,00 CODE ,00 to,00 CODE ,00 to,00 CODE (1) For set pressures less than bar previous consult with our technical department. SPRNG REGULATON RANGE FLUD RECOMMENDED RANG OF PLCATON MODEL SATURATED STEAM * GAS * (1) LQUDS * (1) * * (1) With noxious or expensives fluids apply only model. f external backpressure exists, the model cannot be used. With external constant backpressure, the spring is adjusted deducting the backpressure from the set pressure. Tel.: Fax:

5 GB-5 NTAKE FLANGE CE FLANGE WEGHT N Kgs. PN-/0 EN EN PN-10/16 EN EN MODEL d0 π d0 2 A0 = H H 1 h 1 L1 L2 L3 L R CONNECTONS D1 K1 1 b1 DRLLS Nº D2 K2 2 b2 DRLLS Nº BRONZE STEEL STANLS STEEL 295 1/2 x 1 x / x 1 1/ x 1 1/2 x 0 31, / x , Whitworth cylindrical Male x Female thread SO 228/ (DN-9) (16) (1) (2) (3) 1 1 (12) (3) (1) (3) (1) (3) (16) (3) 0,62 9 2,89 2,86 1,35 1,32,90,87 2,68 2,57 6,52 6,1 5,,86 10,72 10,3 0,6 0,61 2,73 2,70 1,27 1,2,6,3 2,50 2,39 6,3 6,23,81,52 9,83 9,5 0,65 0,62 2,67 2,6 1,30 1,27,57,5 2,55 2, 6,39 6,28,89,60 10,06 9, BRONZE CODE STEEL STANLS STEEL (1) Bronze. PN-/0. EN (2) Bronze. PN-0. EN (3) Bronze. PN-10/16. EN Model 295 Model 296 Tel.: Fax:

6 GB-6 p a = Overpressure permitted [bar] absolute. p = Set pressure [bar] absolute. 1,28 1,26 1,2 1,22 1, 1, 1,16 1,1 1,12 1,10 1,08 1,06 1,0 1,02 1,00 Overpressure factors Multiply the discharge capacity obtained from the tables, by the correction factor, in order to obtain the discharge capacity at required overpressure. AR SATURATED STEAM WATER % p 5 10 OVERPRSURE N % COEFFCENT OF DSCHARGE FOR SATURATED STEAM AND GAS 1/2" x 1" 3/" x 1 1/" 1" x 1 1/2" 1 1/" x 2" d0 h h/d0 x 2, 0,1 3,75 0, x 0 5,00 0, 28 7,00 0, COEFFCENT OF DSCHARGE αd SATURATED STEAM GAS LQUDS SET PRSURE 0 to 1,00 1,00 to,00 0 to,00 9 0, ,62 5 0,62 5 0,62 DSCHARGE CACTY 1/2" x 1" x 3/" x 1 1/" 1" x 1 1/2" x 0 1 1/" x 2" d0 28 π d0 A0 = 2 31,2 6,8 P [bar] For other, not so dense liquids, other than water at C apply: A VL = L. VA ó VA = VL. L A - Saturated steam in Kg/h. - Air at 0 C and 1,013 bar in [Nm 3 /h]. - Water at C in l/h. VA = Water flow according to table. VL = Liquid flow. VA = Water density at a C. (VA=998 Kg/m 3 ). VL = Liquid density. SET PRSURE 1,0 1,5 2,0 2,5 3,0 3,5,0,5 5,0 6,0 7,0 8,0 9,0 10,0 12,0 1,0 16,0,0,0 22,0 2,0, Calculus acording to SO-126-1:0 Safety valves Tel.: Fax: