Type Pneumatic Control Valve Type 3525 Globe Valve

Transcription

1 Type Pneumatic Control Valve Type 355 Globe Valve Application Dump valve designed for use in high-pressure on/off applications in upstream oil and gas production. Valve size NPS 1 to 3 Pressure rating Class 600 to 1500 Class 1700 (intermediate rating, standard class) Temperatures 50 to +300 F ( 46 to +149 C) Type 355 Globe valve with Type 3571 Pneumatic Actuator, 7 to 116 in² effective diaphragm areas Valve body manufactured of A35 LCC Valve plug made of Stellite 6 (R30006) Tungsten carbide (only for compact version) Features Compact design the size of the valve has been optimized for installation where space requirements are tight Easy maintenance a threaded bonnet/body connection offers easier access to the trim without the need for assorted tools or removal of the valve body from the pipeline Travel limit adjustment by a threaded coupling Durable plug trim Standard trim material is Stellite 6 (R30006) NACE MR 0175/ISO compliance for use with sour gases and other corrosive media Environmentally friendly packing retaining a consistent seal due to the PTFE V-rings and the supporting spring. As the PTFE rings wear, the supporting Hastelloy spring adjusts to spread the V-rings wider, maintaining the seal longer, and in turn reducing the need for maintenance Interchangeable fail-safe action the fail-safe action can be changed without removing the valve from the actuator from air-to-open to air-to-close and vice versa Versatile actuator a supply pressure of 35 or 50 psi allows the entire range of differential pressures permitted in this pressure class to be safely controlled by the actuator, regardless of the flow direction (FTO, FTC) or the fail-safe action (air-to-open, air-to-close) Two-piece stem allowing the actuator to be removed prior to bonnet removal for easy maintenance Interchangeable flow direction (FTO, FTC) Fig. 1: Standard Version Type Globe Valve Versions Standard version (Fig. 1) for temperatures ranging from 50 to +300 F and pressure rating Class 600 to 1500 and Class 1700 (ASME B16.34) Type Standard globe valve (NPS 1 to 3) with Type 3571 Pneumatic Actuator and standard springs Type Standard globe valve (NPS 1 to 3) with Type 3571 Pneumatic Actuator and reduced spring force when the air supply drops below 50 psi Compact version for temperatures ranging from 50 to +300 F and pressure rating Class 900 Type 355 Compact globe valve (NPS 1) with threaded ends and Type 3571 Pneumatic Actuator Type 355 Compact T-pattern valve (NPS 1) as globe or angle valve with threaded ends and Type 3571 Pneumatic Actuator Further versions Compact version with extended temperature range from 10 to +400 F ( 3 to +04 C) Edition January 017 Data Sheet T 883 EN

2 Principle of operation The process medium flows through the valve in the direction indicated by the arrow. The position of the valve plug determines the cross-sectional area between the seat and plug. Fail-safe positions Depending on how the compression springs are arranged in the actuator the control valve has two different fail-safe positions which become effective upon supply air failure: Actuator stem extends (fail-close, air to open): The actuator springs close the valve when the supply air fails. Actuator stem retracts (fail-open, air to close): The actuator springs open the valve when the supply air fails. Fig. : Standard version Type 355 Globe Valve with Type 3571 Pneumatic Actuator (fail-close) A Safety bleed Fig. 3: Bonnet for standard version >Class 900 with FKM O-ring Legend of Fig. to Fig Packing 9 Lock nut 1 Body 16 V-ring packing 11 Screw plug Bonnet 17 O-ring 17 Seat ring gasket 3 Yoke 9 Plug 4 Safety plate 4 Seat 36 Plug stem 44 Support ring 5 Plug (9, 36) 7 Guiding bushing 11 Spring 1 Washer 60 Yoke assembly with travel indicator 8 Screw 83 Hanger 84 Travel indicator scale A7 A16 A8 S Actuator stem Vent plug Stem connector clamp Signal pressure connection T 883 EN

3 Fig. 4: Compact version Type 355 Globe Valve A16 A7 S A Fig. 5: Compact version Type 355 T-pattern Valve with Type 3571 Pneumatic Actuator (fail-close) T 883 EN 3

4 Table 1: Technical data Version Standard globe valve Compact globe valve Compact T-pattern valve Valve size NPS 1 to 3 1 Pressure rating Class 600, 900, 1500, Characteristic, quick opening Linear, quick opening ASTM material A35 LCC End connections NPT female thread, RF, RTJ NPT female thread Seat-plug sealing Metal seal Graphite/metal seal Temperature range Leakage class standard with HNBR O-ring: 50 to +300 F 46 to +149 C 1) optional with FKM O-ring: 10 to +400 F 3 to +04 C ) 1) In case of oils that cause severe swelling use FKM O-ring. ) Standard globe valves >Class 900 with FKM O-ring are equipped with an additional support ring which is inserted into the groove of the bottom O-ring (see Fig. 3). Table : Materials Standard version Valve body Valve bonnet IV A35 LCC A35 LCC Seat and plug Stellite 6 (R30006) or tungsten carbide 1) Plug stem A H1150D Nitronic A479 XM-19-H S0910 Guide bushing A747 CB7Cu-1 H1150DBL Nitronic A479 XM-19-H S0910 Packing PTFE NACE-compatible Spring: Hastelloy C-76 O-ring 1) Tungsten carbide only for compact version HNBR optional: FKM Table 3: Pressure-temperature diagram for Class 1700, A35 LCC (Intermediate Rating Standard Class, acc. ASME B16.34) 450 psi/rt [psi] Temperature [ F] 450 psi/rt [bar] Temperature [ C] T 883 EN

5 Table 4: Pressure ratings and connections Seat Ø Travel NPS Class Version Connection in mm in mm , 900, 1500 Compact globe valve Compact T-pattern valve NPT ½ 1.7 ½ 1.7 RF, RTJ Standard globe valve 900, 1500, 1700 NPT 3 / ¾ / ¾ / , 900, 1500 RF, RTJ ¾ Standard globe valve 1½ / , 900, 1500, 1700 NPT 3 600, 900, 1500 Standard globe valve RF, RTJ ¾ ½ / ¾ ½ Table 5: C V coefficients Table 5.1: Standard globe valve Class NPS C V K VS Seat Ø Rated travel 600 to Travel in % Flow coefficient (C V coefficient) Flow direction: Flow-to-open (FTO) in mm in mm / ¾ / / ¾ / ½ 38.1 / / ¾ / ½ 38.1 / / ¾ / / ¾ / ½ 38.1 / / ¾ / ½ 38.1 / Table 5.: Compact globe valve and compact T-pattern valve NPS C V K VS Seat Ø Rated travel Travel in % Flow coefficient (C V coefficient) Flow direction: Flow-to-close (FTC) in mm in mm ½ 1.7 ½ T 883 EN 5

6 Table 6: Allowable differential pressures (pressure in psi) Fail-close Flow direction: Flow-to-open (FTO) Actuator size Stroke Bench range [psi] Full stroke 3 to to to 5 9 to to 35 4 to 50 7 in² (175 cm²) stroke 7.3 to to to to 35 4 to to 50 1 /3 stroke 31.5 to to 50 1 to to to to in² (350 cm²) 116 in² (750 cm²) Supply air Valve travel Full stroke 11.5 to 0 18 to 31 1 to 36 9 to 50 stroke 14 to 0 to 31 6 to to 50 1 /3 stroke 17 to to to to 50 Full stroke 10 to to to 48 stroke 1. to to to 48 1 /3 stroke 14.3 to to to 48 bar psi mm inch ½ ½ Valve type Compact Standard Cv 7 Linear to to 43 Valve size NPS Actuator [in²] p [psi] when p = 0 psi(g) Full stroke to >450 to >450 >450 1 to to >450 >450 to T 883 EN

7 Table 7: Allowable differential pressures (pressure in psi) Fail-open Flow direction: Flow-to-open (FTO) Actuator size Stroke Bench range [psi] Full stroke 3.5 to to 14 3 to 16 8 to to to to 40 7 in² (175 cm²) stroke 3.5 to to to to to to to 9 1 /3 stroke 3.5 to to to to to to 3. 7 to in² (350 cm²) 116 in² (750 cm²) Supply air Valve travel Full stroke 9 to 16.5 stroke 9 to 14 1 /3 stroke 9 to to to to to 33 to to 8 to to 3 to 8 Full stroke 3 to to 6 16 to 3 stroke 3 to to.4 16 to 7 1 /3 stroke 3 to to to 1.5 bar psi mm inch ½ ½ Valve type Compact Standard Cv 7 Linear to to 43 Valve size NPS Actuator [in²] p [psi] when p = 0 psi(g) Full stroke 1 7 > to > to >450 >450 >450 1 to to >450 > to T 883 EN 7

8 Table 8: Valve dimensions Body type L H1 H NPS 1 3 Version Compact globe valve Compact T-pattern valve Standard globe valve Connection NPT NPT RF RJF NPT RF RJF NPT RF RJF Class 600 Class 900 Class 1500 Class 1700 in mm in ) mm ) in mm in mm in mm in mm ) ) Length without threaded stopper. This length can be extended by approx in/9 mm depending on the position of the threaded stopper. Table 9: Actuator dimensions and weights Actuator Diaphragm ØD in² cm² in mm H 1) in mm H3 ) in mm a ¼ NPT 3 /8 NPT Thread M30 x 1.5 Weight lbs kg ) Height with welded-on lifting eyelet or height of eyebolt according to DIN 580. Height of the swivel lifting hook may differ. Actuators up to 54 in²/350 cm² without lifting eyelet ) Minimum clearance required to remove the actuator 8 T 883 EN

9 Dimensional drawings ØD H H1 H H3 H H1 H H3 ØD L L Standard globe valve, NPS 1 to 3, flanges Standard globe valve, NPS 1 to, threaded ends ØD H H1 H H3 H ØD a H H1 H H3 L L Compact globe valve, NPS 1 Compact T-pattern valve, NPS 1 T 883 EN 9

10 Table 10: Valve weights (excluding actuators) Body type Class 600 Class 900 Class 1500 Class 1700 NPS 1 3 Version RF/RTJ NPT RF/RTJ NPT RF/RTJ NPT NPT Compact globe valve Compact T-pattern valve Standard globe valve lbs kg lbs 44.1 kg 0 lbs / kg / lbs kg lbs / kg / lbs kg lbs kg Specifications subject to change without notice SAMSON CONTROLS INC Cedar Boulevard Baytown, Texas Phone: Fax: samson@samsongroupna.com T 883 EN English