Full lift safety valve with spring loading. (AIT) Model 496

Transcription

1 Full lift safety valve with spring loading. (AT) Model 96 EP AP ES CP 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 instantly and totally. Design in line with the "AD-MERKBLATT A2 Specifications sheet" and "Technical safety instructions for TRD-21 steam boilers". n accordance with UNE 9--6 "Safety valves" (Steam boilers). Component test stamp: TÜV Rheinland (German technical supervision authority). Licence N. : PENDNG ALLOCATON Specifications 90 angular flow. Activated by direct action helicoid spring. Simplicity of construction ensuring minimum maintenance. Materials carefully selected for their resistance to corrosion. With the exception of washers and couplings, the valves are free of non-ferric materials. nternal body designed to offer favourable flow profile. Sealing surfaces treated and balanced, making them extremely tightness, even exceeding DN-30 requeriments. Page 3. Great discharge capacity. For liquids typically used with openings similar to proportional safety valves. Equipped with draining screws for removing condensation. Auto-centering plug. Threaded shaft with lever positioner facilitating immediate manual action. Elevator, independent of the seal, designed facilitate sudden opening when the steam expands and, with any fluid, guarantees absolute opening and closing precision. 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.

2 MPORTANT Depending on demand: 1.- Blocking screw which facilitates hydrostatic testing of the container which to be 1.- protected. 2.- Rapid limiter to reduce the coefficient of discharge. 3.- seals,,... etc., achieving 3.- leakage levels less than Pa cm3-3 0,3 x 10 seg. 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 APPLCATON FOR THE SEALS SET PRESSURE N bar 1,,0, 7,0 30,0 S V T S V T TEMPERATURE N C ACCORDNG TO MANUFACTURERS RECOMMENDED BY VYC MNMUM MNMUM (1) (1) For temperatures exceeding 230 C apply metallic seal only.- Flourelastomer (Vitón) membrane and O-ring isolating the rotating or sliding.- parts from the working fluid. 5.- Electrical contact indicating open/closed. 6.- Balance bellows to: mmmprotect the spring from atmospheric influences. mmmensure outside of valve body is totally tightness. mmmlevel out external or self-generated back pressure. 7.- Possibility of manufacture in other types of material, for special operating con- 7.- ditions (high temperatures, fluids, etc.)..- Totally free of oil and grease, to work with oxygen, avoiding possible fire risks.- (UV-Oxygen-VBG 62). 9.- Special springs for critical temperatures., EP AP ES CP N. PECE PECE CAST RON NODULAR RON MATERAL CAST STEEL STANLESS STEEL , 5, , , , 29, 30, 31 33, 3, , Body Closed bell Open bell Hood Elevator Cam Lever Seating Plug Spring press Separator Rod Lever shaft Gudgeon Ring Safety ring Spring Gland Hollow screw Hollow screw nut Buffer nut Rod check nut Nut Washer Stud Screw Cap Coupling Coupling Seal Seal Characteristic plate Rivets Plug Sealing disk Washer Limiter Membrane O-ring DN1 x DN2 PN PRESSURE N bar OPERATNG MAX. TEMP. N C CONDTONS MN. TEMP. N C Cast iron (DN-0.60 GG-) Cast iron (DN-0.60 GG-) Cast iron (DN-0.60 GG-) Nodular iron (DN-0.70 GGG-) Nodular iron (DN-0.70 GGG-) (1) Nodular iron (DN-0.70 GGG-) (1) Nodular iron (DN-0.70 GGG-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Carbon steel (DN Ck-67) Stainless steel (DN-1.2) (AS-) Vanadium-chrome steel (DN CrV) (2) Carbon steel (DN-1.11 Ck-15) Carbon steel (DN-1.11 Ck-15) Carbon steel (DN-1.11 Ck-15) Carbon steel (DN-1.11 Ck-35) Carbon steel (DN-1.11 Ck-35) Klingerit cardboard Copper Graphite Carbon steel (DN-1.11 Ck-15) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.2) (AS-) -10 (1) DN- x in stainless steel (DN-1.) (ASTM A351 CFM). 0 Nodular iron (DN-0.70 GGG-) Nodular iron (DN-0.70 GGG-) Nodular iron (DN-0.70 GGG-) Nodular iron (DN-0.70 GGG-) Nodular iron (DN-0.70 GGG-) (1) Nodular iron (DN-0.70 GGG-) (1) Nodular iron (DN-0.70 GGG-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Carbon steel (DN Ck-67) Stainless steel (DN-1.2) (AS-) Vanadium chrome steel (DN CrV) (2) Carbon steel (DN-1.11 Ck-15) Carbon steel (DN-1.11 Ck-15) Carbon steel (DN-1.11 Ck-15) Carbon steel (DN-1.11 Ck-35) Carbon steel (DN-1.11 Ck-35) Klingerit cardboard Copper Graphite Carbon steel (DN-1.11 Ck-15) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.2) (AS-) x to x 1 3 Cast steel (DN GS-C N) Nodular iron (DN-0.70 GGG-) Cast steel (DN GS-C N) Nodular iron (DN-0.70 GGG-) Nodular iron (DN-0.70 GGG-) (1) Nodular iron (DN-0.70 GGG-) (1) Nodular iron (DN-0.70 GGG-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.2) (AS-) Carbon steel (DN Ck-67) Stainless steel (DN-1.2) (AS-) Vanadium chrome steel (DN CrV) (2) Carbon steel (DN-1.11 Ck-15) Carbon steel (DN-1.11 Ck-15) Carbon steel (DN-1.11 Ck-15) Carbon steel (DN-1.11 Ck-35) Carbon steel (DN-1.11 Ck-35) Klingerit cardboard Copper Graphite Carbon steel (DN-1.11 Ck-15) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.2) (AS-) Stainless steel (DN-1.) (ASTM A351 CFM) Stainless steel (DN-1.) (ASTM A351 CFM) Stainless steel (DN-1.) (ASTM A351 CFM) Stainless steel (DN-1.) (ASTM A351 CFM) Stainless steel (DN-1.) (ASTM A351 CFM) Stainless steel (DN-1.) (ASTM A351 CFM) Nodular iron (DN-0.70 GGG-) Stainless steel (DN-1.52) (AS-630) (17-PH) Stainless steel (DN-1.52) (AS-630) (17-PH) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.310) (AS-301) Stainless steel (DN-1.1) (AS-3) (3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Carbon steel (DN-1.11 Ck-15) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) Stainless steel (DN-1.1) (AS-3) (2) Spring steel (DN GRADE-B) for wire spring Ø < mm. Maximum temperature 0 C. (3) Vanadium chrome steel (DN CrV) for wire spring Ø > 10 mm. 29 0

3 Full lift safety valve with spring loading (AT) model 96 - AP and CP. 1. Disassembly and assembly. 1.1 Disassembly. To replace the spring () or clean any of the internal components of the valve, proceed in the following manner: A - Withdraw the clip (), using a punching tool, until the lever (10) comes free. B - Loosen the screws (3) and take the cap (6) off. C - Holding the spindle () steady, loosen the hollow screw nut () and the holow screw () until you note a realasing of the spring (). D - Mark on the spindle () the position of the spindle lock-nut (27) and the adjusting nut (26). Loosen them and remove them. E - Unscrew the nuts (29) and remove them, together with the studs () and their washers (30). F - Lift the cover (3) or (2) and you will have access to all of the components. 1.2 Assembly. A - Place the safety-ring () on the spindle () and press it against the gasket (12). B - n the spindle channel () connect the ring (19) and fix it to the security-ring (21). ntroduce the elevator (7) into the upper part of the spindle () and press this against the previously described pieces. C - Enter the guide (), the separator (15), the spring-press (), the spring (), the spring-press () through the upper part of the spindle () and press this against the previously descrobed pieces. D - Replace the assembly (3) and the cover (3) or (2). E - Place the washers (30) on the studs () and make up the nuts (29) diagonally, checking the correct alignment of the cover (3) or (2). F - Adjust the firing pressure with the hollow screw () and fix the adjustment position with the hollow screw nut (). G - Turn the spindle lock-nut (27) and the adjusting nut (26) to the position mrked (see 1.1.D) and make up against each other. H - ntroduce the cap (6) and tighten the screws (3). - Place the lever (10) and fix it with the fastener (). 2. Adjusting the firing pressure. A - Proceed according to points 1.1.A, 1.1.B, 1.1.C. B - Proceed according to points 1.2.F, 1.2.H, Full lift safety valve with spring loading (AT) model 96 - EP. 1. Disassembly and assembly. 1.1 Disassembly. To replace the spring (), or clean any of the internal components of the valve, proceed in the following manner: A - Move the lever (9) in direction C as far as the constructive catcher. B - Unscrew the cap () and remove. C - Holding the spindle () steady, loosen the hollow screw nut () and the hollow screw () until you note a realeasing of the spring (). D - Mark on the spindle () the position of the spindle lock-nut (27) and the adjusting nut (26). Loosen them and remove them. E - Unscrew the nuts (29) and remove them, together with the studs () and their washers (30). F - Lift the cover (2) and you will have access to all of the components. 1.2 Assembly. A - Place the safety-ring () on the spindle () and press it against the gasket (12). B - n the spindle channel () connect the ring (19) and fix it to the security-ring (21). ntroduce the elevator (7) into the upper part of the spindle () and press this against the previously described pieces. C - Enter the guide (), the separator (15), the spring-press (), the spring (), the spring-press () through the upper part of the spindle () in a correlative manner. D - Replace the assembly (3) and the cover (2). E - Place the washers (30) on the studs () and make up the nuts (29) diagonally, checking the correct alignment of the cover (2). F - Adjust the firing pressure with the hollow screw () and fix the adjustment position with the hollow screw nut (). G - Turn the spindle lock-nut (27) and the adjusting nut (26) to the position marked (see 1.1.D) and make up against each other. H - Change the coupling (39) and lightly tighten the cap (). Move the lever (9) towards position A as far as the constructive catcher. Definitively tighten the cap (). 2. Adjustig the firing pressure. A - Proceed according to points 1.1.A, 1.1.B, 1.1.C. B - Proceed according to points 1.2.F, 1.2.H. Full lift safety valve with spring loading (AT) model 96 - ES. 1. Disassembly and assembly. 1.1 Disassembly. To replace the spring (), or clean any of the internal components of the valve, proceded in the following manner: A - Unscrew the cap (5) and remove. B - Holding the spindle () steady, loosen the hollow screw nut () and the hollow screw () until you note a realeasing of the spring (). C - Unscrew the nuts (29) and remove them, together with the studs () and their washers (30). F - Lift the cover (2) and you will have access to all of the components. 1.2 Assembly. A - Place the safety-ring () on the spindle () and press it against the gasket (12). B - n the spindle channel () connect the ring (19) and fix it to the security-ring (21). ntroduce the elevator (7) into the upper part of the spindle () and press this against the previously described pieces. C - Enter the guide (), the separator (15), the spring-press (), the spring (), the spring-press () through the upper part of the spindle () in a correlative manner. D - Replace the washers (3) and the cover (2). E - Place the washers (30) on the studs () and make up the nuts (29) diagonally, checking the correct alignment of the cover (2). F - Adjust the firing pressure with the hollow screw () and fix the adjustment position with the hollow screw nut (). G - Change the coupling (39) and tighten the cap (5). 2. Adjusting the firing pressure. A - Proceed according to points 1.1.A, 1.1.B. B - Proceed according to points 1.2.F, 1.2.G.

4 NTAKE FLANGE ESCAPE FLANGE WEGHT N Kgs. DN 1 x DN 2 π. Ao = 2. H h 1 L 1 L 2 PN-10/ DN-/33 PN-/ DN-2607 DN-/5 R PN-10/ DN-/33 DN-2605 DN-/5 D 1 K 1 Ι 1 b 1 DRLLS N. D 1 K 1 Ι 1 b 1 DRLLS N. D 2 K 2 Ι 2 b 2 DRLLS N. MODEL EP AP ES CP EP AP ES CP EP AP ES CP EP AP ES CP EP AP ES CP EP AP ES CP EP AP ES CP EP AP ES CP CAST RON,00 7, 7,60 7,0 9,60, 9,12 9,3,7 12,2,17,3,27,7 19, 19,6 26,6,67,3,77 39, 36,52 37, 3,10 55, 51, 52,70 53,30 2,15 75,9 7,0 7,6 NODULAR RON,73,07,29,9 10,7 9,6 9,9 10, 15,,99,37,63,11,5 21,00 21,3 29,11 26,92 27,65 2,0 3,0 39,,92 1, ,99 57,51 5,11 9,6 2,91 5,15 5,75 CAST STEEL STANLESS STEEL, 7,6,07,27 10,60 9,0 10,07 10,33,7,75,12,3 21,27 19,67,,63 2,6 26,52 27, 27,67 1, 3,36 39,,00 5, 5,09 55,55 56,15 7,15 0,61 2,79 3,39 CAST RON NODULAR RON CAST STEEL STANLESS STEEL x /" x /" x /" x /" Whitworth gas-tight cylindrical female thread SO /1 197 (DN-9) () 5 5 ()* x /" () * x /" () * x /" () * x /" () * * Cast steel (GS-C N) and Stainless steel (1.). Nodular iron (GGG-). EP ES CP AP PERMSSBLE BACK PRESSURE N % OF SET PRESSURE RECOMMENDED RANGES OF APPLCATON MODEL EP AP(1) ES FLUD NTERNAL OR GENERATED EXTERNAL VARABLE (1) EXTERNAL CONSTANT (1)(2)(3) % OVERPRESSURE CP (1) OPEN AND CLOSED PRESSURES N % OF SET PRESSURE FLUD PRESSURE N bar OPENNG PRESSURE CLOSNG PRESSURE SATURATED STEAM < 3 3 < % + 5 % + 10 % - 0,3 bar - 10 % - 0,6 bar % - % (1) (2) (3) f external overpressure exists, the AP and CP model cannot be used. With external constant overpressure, the spring is adjusted deducting the overpressure from the set pressure. f the set pressure < 3 bar we must consider the total atmospheric pressure (1 bar) as external constant overpressure being freely released. f pa > 0,p, we must limit plug speed with the consequent reduction of the αd coefficient of discharge. With the new reduced coefficient we determine the d0, in order to remove the necessary volume. pa = Overpressure permitted [bar] absolute. pa = Set pressure [bar] absolute. αd = Coefficient of discharge.

5 SET PRESSURES AND REGULATNG RANGES DN 1 x DN 2 x x x x 65 x 0 65 x 0 x 1 x 1 PN- SET PRESSURES N bar ( AND ) (SATURATED STEAM) PN- PN- PN- STEAM AND 30 MNMUM 0, a 0, ,66 a 1, ,95 a 1, ,30 a 1, ,0 a 2, SPRNG REGULATNG RANGE N bar 2, a 3,60 3, a 5,00,0 a 6,30 6,00 a,00 7, a 10,00 9, a 12, ,00 a, ,00 a, ,00 a, ,00 a, ,00 a, Spring steel (DN GRADE-B). Maximum temperature for EP, ES and CP models 0 C. Vanadium-chrome steel (DN CrV)..

6 COEFFCENT OF DSCHARGE 0,6 αd 0, 0,7 αd DN 1 x DN 2 x x x x 65 x 0 65 x 0 x 1 x ,7 h 7,00 9,00 12,00 12,00,00,00,00 29,00 0, h 1 h/ 2,60 0, 3, 0,00 00, 05, 00,3 06, 0 0,00 00,36 10,00 00, 12, 00,3 0,36 0,3 0,6 h 1 / (1) 0, 0, 00, 00, 00, 00, 00, 00, COEFFCENT OF DSCHARGE αd 0,7 0,1 0,60 h WTH RAPD 0,36 0 LMTER (1) 0 0,1 0,3 0, 0, 0,1 0,3 h 0, 0, αd 1,2 1,26 1, 1, 1, 1, 1, 1, 1,12 1,10 1,0 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 WATER % p ,7 0,6 pa p 0,6 0,3 0, 0,6 OVERPRESSURE N %

7 DSCHARGE CAPACTY DN 1 x DN 2 x x x x 65 x 0 65 x 0 x 1 x π. Ao= p [bar] -Saturated steam in Kg/h. - Air at 0 C and 1,0 bar in [Nm 3 /h]. - Water at C in l/h. For other, not so dense liquids, other than water at C apply: V L = A L. VA ó VA = VL. L A VA = Water flow according to table. V L = Liquid flow. VA = Water density at a C. (V A=99 Kg/m 3 ). V L = Liquid density. SET PRESSURE N bar , , , , , , , , , , , , , , , , , , , , , , , , , , ,0 3, Calculus according to "AD-Merkblatt A2".,