Valves are composed of those several parts; it’s a good thing, let’s encourage each other

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The method for coding valve models, JB308—75 \"Method for Coding Valve Models\", is applicable to gate valves, globe valves, throttle valves, plug valves, ball valves, butterfly valves, diaphragm valves, check valves, foot valves, safety valves, steam traps, pressure reducing valves, etc., used in industrial pipelines. JB4018—85 \"Method for Naming Electrical Valve Models\" applies not only to the valves mentioned above but also to boiler feed water distribution valves, control valves, level gauges, and balance tanks. These two standards are essentially the same; the only difference is that JB4018—85 \"Method for Naming Electrical Valves\" includes additional information regarding valve types and structural forms. I. Composition of Valve Models The composition of a valve model consists of seven units in sequence, as shown in Table 1-8. Table 1-8 Composition of Valve Models http://www.yihuan.org/img/famen*nghaobianzhifangfa.jpg II. Codes for Valve Types and Structural Forms Return to top The code for the valve type is represented by Chinese Pinyin letters, while the code for the structural form is represented by Arabic numerals, as shown in Table 1–9. Structural Code Type Code 0123456789 Gate Valve Z Sliding stem wedge type Elastic gate plate Sliding stem wedge type Rigid single gate plate Sliding stem wedge type Rigid double gate plates Sliding stem parallel type Rigid single gate plate Sliding stem parallel type Double gate plates Hidden stem wedge type Rigid single gate plate Hidden stem wedge type Rigid double gate plates Hidden stem parallel type Double gate plates Globe Valve J Straight-through type Straight-through type Z-shaped Angular type Straight-flow type Balanced straight-through type Balanced angular type Three-way type Plunger Valve U Straight-through type Plug Valve X Packing-type straight-through type Packing-type T-three-way type Packing-type four-way type Oil-seal straight-through type Oil-seal T-three-way type Ball Valve Q Floating straight-through type Floating Y-three-way type Floating L-three-way type Floating T-three-way type Fixed four-way type Fixed straight-through type Butterfly Valve D Lever type Vertical plate type Inclined plate type Diaphragm Valve G Ridge type Cut-off type Gate plate type Check Valve Bottom Valve H Rising straight-through type Rising vertical type Rising Z-shaped straight-through type Swing single-disc type Swing multi-disc type Swing double-disc type Rising rotary type Rising throttle recirculation type Safety Valve A Spring-enclosed with fins, fully open type Spring-enclosed, slightly open type Spring-enclosed, fully open type; single-lever fully open type Spring-unenclosed with wrench, double spring slightly open type, single-lever slightly open type Spring-unenclosed with wrench, fully open type, double-lever fully open type Spring-unenclosed with wrench, slightly open type, single-lever angular slightly open type Spring-unenclosed with control mechanism, fully open type Spring-unenclosed with wrench, slightly open type Spring-unenclosed with wrench, fully open type Pulse type (pilot-operated) Trap S Float-type Bellows type Diaphragm box type Needle float type Bimetallic strip type Throttle orifice plate type Pulse type Thermodynamic disc type Pressure Reducer Valve Y Diaphragm type Spring diaphragm type Piston type Bellows type Lever type Water Distribution Valve F Plunger type Rotating type Bypass type Control Valve T Rotating sleeve type Rising multi-stage plunger type Z-shaped Rising single-stage needle type Rising single-stage plunger type Rising single-stage sleeve type Z-shaped Rising single-stage gate plate type Rising single-stage sleeve type Rising multi-stage sleeve type Rising multi-stage plunger type Level Gauge Balanced container B Low-read, light liquid, glass tube type On-site mica sheet type On-site glass plate type On-site glass tube type Low-read, light liquid, glass plate type Balanced container On-site optical refractive two-color type Note: 1. For lever-type safety valves, the Chinese Pinyin letter “G” is added before the type code. 2. For valves operating at low temperatures (below -40°C), those with insulation (equipped with a heating jacket), and those equipped with bellows, the Chinese pinyin letters “D”, “B”, and “W” are added before the type code, respectively. 3. This table refers to the standards JB4018—85 and JB308—75 for the method of specifying valve models; wherein the valve type codes F, T, and B are based on the JB4018—85 standard for specifying valve models in power plants. 4. The codes for the types and structural forms of plunger valves are the same as those for globe valves; at present, only the straight-through type is produced in China. III. Codes for valve actuation methods and connection types Return to top The codes for valve actuation methods and connection types are represented by Arabic numerals, as shown in Table 1-10. Table 1-10 Codes for Valve Actuation Methods and Connection Types Actuation Method Connection Type Code Actuation Method Connection Type Code Electromagnetic 0 Bevel gear 5 Electro-hydraulic Internal thread 1 Pneumatic Welded 6 Electro-hydraulic External thread 2 Hydraulic Clamp-type 7 Worm gear 3 Pneumatic-hydraulic Band clamp 8 Spur gear Flange 4 Electric Collar type 9 Note: 1. In the actuation methods, codes for handwheel, handle, and wrench-driven operation, as well as those for safety valves, pressure relief valves, and steam traps, are omitted. 2. For pneumatic or hydraulic types: normally open types are denoted by 6K and 7K ； Normally closed is indicated by 6B and 7B ； Pneumatic with manual operation is indicated by 6S. Explosion-proof electric types are denoted by 9B. 3. Welding in connection types includes butt welding and socket welding. IV. Codes for the seat sealing surface or lining material Return to top The codes for the seat sealing surface or lining material are represented by Chinese Pinyin letters, as shown in Table 1-11. Table 1-11 Codes for Seat Sealing Surface or Liner Materials Seat Sealing Surface or Liner Material Code Seat Sealing Surface or Liner Material Code Seat Sealing Surface or Liner Material Code Copper alloy T Fluoroplastic F Rubber-lined J Rubber X Alloy steel, acid-resistant or stainless steel H Lead-lined Q Nylon plastic N Nitrided steel D Enameled C Tin-based bearing alloy (Babbitt) B Cemented carbide Y Boronized steel P Note: The code for the seat sealing surface material that is directly machined from the valve body is denoted by “W”. When the sealing surface materials of the seat and the valve disc (gate) are different, the code of the lower-hardness material is used (except for diaphragm valves). V. Codes for valve body materials Return to top. The codes for valve body materials are represented using Chinese Pinyin letters, as shown in Table 1-12. Table 1-12: Codes for valve body materials. Valve body material | Code; Gray cast iron | Z(H); 1Cr5Mo, ZG1Cr5MoI; Malleable cast iron | K1Cr18Ni9Ti, ZG1Cr18Ni9TiP; Ductile iron | Q1Cr18Ni12Mo2Ti, ZG1Cr18Ni12Mo2TiR; Copper and copper alloys | T; Carbon steel | C12CrMoV, ZG12CrMoVV. Note: 1. This code is omitted for gray cast iron valve bodies with a nominal pressure of PN ≤ 1.6 MPa, as well as for carbon steel valve bodies with a nominal pressure of PN ≥ 2.5 MPa. 2. JB4018—85 specifies that the code for gray cast iron in the method for naming power station valves is “H”. VI. Code for nominal pressure Return to top The code for nominal pressure is expressed in Arabic numerals. The nominal pressure values are in accordance with the provisions of **Standard JB1048—90 for nominal pressures of piping components**, as shown in Table 1-2. 1. Power station valves: When the maximum temperature of the medium is ≤ 450°C, the nominal pressure value is indicated. When the maximum temperature of the medium exceeds 450°C, the operating temperature and operating pressure must be indicated. The operating pressure shall be denoted by the symbol P, and the value equal to one-tenth of the maximum temperature of the medium shall be indicated in the lower right corner of the letter P; this value is denoted as Pt, followed by the operating pressure in Arabic numerals. For example, a valve with an operating temperature of 540°C and an operating pressure of 10 MPa is designated as P5410V. For general-purpose valves, the operating pressure is 10 times the value expressed in MPa; for example, the P5410V valve used in power plants is not classified as P54100 among general-purpose valves. 2. For general-purpose valves, both the nominal pressure and operating pressure values are expressed as 10 times the values in MPa. VII. Naming of Valves Return to top The names of valves are determined based on the drive method, connection type, structural design, lining material, and type. However, the following are omitted in the naming: 1. In terms of connection type: “flange”; 2. In terms of structural type: ⑴ for gate valves, “open rod”, “elastic”, “rigid” and “single gate plate”” ； ⑵”Straight-through type” for stop valves and throttle valves” ； ⑶\"Floating\" and \"through-type\" of ball valves” ； ⑷Vertical plate type of butterfly valve” ； ⑸Ridge type of diaphragm valve” ； ⑹“Seal” and “through-type” of plug valves” ； ⑺“Straight-through” and “single-disc” types of check valves” ； ⑻The “non-sealing” of the safety valve” ； 3. “Material name” in the valve seat sealing surface material. VIII. Examples of methods for compiling valve models and names. Return to top. 1. General-purpose valves: (1) Electric drive, flange connection, double wedge-shaped gate valves with exposed stem; the valve seat sealing surface material is processed directly from the valve body; nominal pressure PN0.1MPa; valve body material is gray cast iron: Z942W-1 Electric wedge-shaped double gate valve. (2) Manual operation, external thread connection, floating straight-through type; the valve seat sealing surface material is fluoroplastic; nominal pressure PN4MPa; valve body material is 1Cr18Ni9Ti: Q21F-40P External thread ball valve. (3) Pneumatic, normally open type, flange connection, ridge design; lining material is rubber-lined; nominal pressure PN0.6MPa; valve body material is gray cast iron: G6K41J-6J Pneumatic normally open diaphragm valve. (4) Hydraulic drive, flange connection, vertical plate type; the valve seat sealing surface material is cast copper, while the valve disc sealing surface material is rubber; nominal pressure PN0.25MPa; valve body material is gray cast iron: D741X-2.5Z Hydraulic butterfly valve. 2. Valve systems for power plants: (1) Cylindrical gear drive, welded connection, double wedge-shaped gate valves with exposed stem; the valve body sealing surface material is alloy steel; operating pressure PN10MPa; operating temperature 540°C; valve body material is 123CrMoV steel: Z462H-P5410V Cylindrical gear drive double gate valve. (2) Electric drive, welded connection, multi-stage sleeve plunger type; the valve seat sealing surface material is cemented carbide; nominal pressure PN32MPa; valve body material is carbon steel: Control valve. T969Y-32 Electric high-pressure differential control valve: ⑶ Handwheel operation, flange connection, straight-through type; the sealing surface is made of alloy steel, with a nominal pressure of PN10MPa; the valve body is made of carbon steel – it is a globe valve. J41H-10 Globe valve

Product Introduction: Bellows Globe Valve. The bellows globe valve is a patented product developed by our company (Patent Number: ZL 02 2 7335317). This product utilizes bellows-sealed stem technology to enhance sealing performance and achieve zero leakage. Suitable for flammable, explosive, toxic, and harmful media. It features safety, reliability, fire resistance, explosion protection, and no pollution. It is widely used in fields such as petroleum, chemicals, natural gas, and the nuclear industry. During operation, globe valves can develop the following three leakage points due to changes in pressure, temperature, and the medium used: leakage at the middle of the connection between the valve body and the valve cover (external leakage); leakage at the upper part where the valve stem meets the packing (external leakage); and leakage resulting from the seal between the valve seat and the valve disc (internal leakage). In addition, ordinary bellows-type globe valves may encounter the following problem as well: because the bellows located inside the valve body are relatively short, their expansion coefficient is low, which makes them prone to fatigue damage and thus leads to upper leakage ； When connected with bolts in the middle, issues such as uneven bolt torque, loose bolts, and deformation of the sealing gaskets can occur, leading to leaks in that area. To completely resolve the aforementioned issues, our company has developed a new type of bellows stop valve. This product employs the following technical measures (product technical features) to eliminate safety hazards and achieve zero leakage. I. Central welding: Welds the valve body and the valve cover together to completely eliminate leaks in the central area. II. Extend the valve cover and install an extended bellows; by lengthening the valve cover, a longer internal chamber is created together with the valve body (the length being twice that of a regular globe valve). It is equipped with an extended bellows (the number of sections and length are 2-3 times those of a regular globe valve); as a result, the bellows has a high expansion coefficient, resulting in low flow resistance, and it is less prone to damage, thus extending its service life. III. Bellows-sealed valve stem: The lower part of the bellows is welded to the lower end of the lower valve stem, the upper part of the bellows is welded to the lower end of the packing box, and the upper end of the packing box is welded to the valve cover. This prevents the valve stem from coming into contact with the medium, thereby completely eliminating leaks at the upper part of the valve stem. The packing seal, on the other hand, prevents accidental leakage of the bellows. IV. Dual stem structure: The stem of this product is divided into upper and lower sections. As the handwheel rotates, the upper valve stem moves up and down, and through the intermediate guide plate, it causes the lower valve stem to move up and down as well. Its feature is that it eliminates the torque exerted by the lower valve stem on the bellows, ensuring that the bellows are not damaged; it guarantees proper sealing between the valve disc and the valve seat, improves the sealing performance, prevents internal leakage, and extends the service life. V. Product Structure: This product is composed of the following components, featuring an advanced and rational design. (See the structural diagram for details) http://www.zsvalve.net/pic/bwgzzt.jpg This post was last edited by jindin312 on 2009-4-26 11:14]

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Forged steel Y-valves 　Y-type forged steel valves come in three different designs for the valve caps. The first type is the bolted bonnet valve; in valves designed with this configuration, the valve body and the bonnet are connected using bolts and nuts, with winding gaskets (made of 316 stainless steel combined with flexible graphite) providing sealing. Metal ring connection can also be used when the customer has special requirements. The second design type is the welded bonnet valve; in valves designed this way, the valve body and the bonnet are connected by threads, with a fully welded seal. Full welded two-joint connection can also be used when the customer has special requirements. The third type is the pressure-self-tightening valve cover; in valves designed in this manner, the valve body and the valve cover are connected by threads, with an internal pressure-sealing ring providing sealing. Globe valves and check valves can be designed as Y-valves: Y-type globe valve, Y-type check valve, pressure-self-sealing Y-type globe valve. Design structure and characteristics of Y-valves: The globe valves and check valves meet ANSI B16.34 standards. Inspection and testing are in accordance with API598, and marking is in accordance with MSS-SP-25. Adopting the following structure: full-bore or reduced-bore lift type, ball check valve; springs can be installed as needed; detachable solid disc; self-centering pressure plate; compression-type integral upper seal seat; stem-mounted type (OS&Y); bolted connection with wound gasket sealing, threaded connection with fully welded seal cover, and threaded connection with internally pressurized self-tightening cover. The socket end complies with ASME B16.11, while the threaded end (NPT) complies with ANSI/ASME B1.20.1. The disc can be changed to needle type, throttle type, ball type, or check type. Forged steel Y-type globe valve, with pressures ranging from 800Lb to 2500Lb. Material selection table: Serial number, Part name, CS per ASTM, AS per ASTM, SS per ASTM: Type A105N, Type F22, Type F304(L), Type F316(L). 1. Valve body: A105N, A182, F22, A182, F304(L), A182, F316(L). 2. Disc: A276, 420, A276, 304, A276, 304(L), A276, 316(L). 3. Stem: A182 F6a, A182 F304, A182 F304(L), A182 F316(L). 4. Gasket: 316 with flexible graphite, 316 with PTFE. 5. Cover: A105N, A182 F304, A182 F304(L), A182 F316(L). 6. Cover bolts: A193 B7, A193 B16, A193 B8, A193 B8M. 7. Pin: A276, 420, A276, 304. 8. Packing compression sleeve: A276, 410, A182 F304(L), A182 F316(L). 9. Union bolt: A193 B7, A193 B16, A193 B8, A193 B8M. 10. Packing pressure plate: A105N, A182 F304. 11. Nut: A194 2H, A194 4, A194 8, A194 8M. 12. Stem nut: A276, 420. 13. Nut: A194 2H, A194 4, A194 8, A194 8M. 14. Nameplate: SS15. Handwheel: A197. 16. Packing: Flexible graphite, PTFE. Applicable media: Water, steam, oils, etc.; Water, steam, oils, etc.; Nitric acid, acetic acid, etc. Applicable temperatures: -29°C to 425°C, -29°C to 550°C, -29°C to 200°C. Note: Other materials specified by the customer can also be used. The sealing surface material pairing is determined by the internal part code specified by the customer. CS=carbon steel ； AS=alloy steel ； SS=Stainless steel ； Connection dimensions and weight parameters (Figure 1: Structural diagram) NPS1/2″3/4″1″11/4″11/2″2″L98111120140140170H (open) 175215254305305365W100125160160180200Weight56.37.69.813.814.0