1, the performance of the high pressure cut-off valve casting: because of the high pressure casting cut-off valve seat is the change of the channel and the disc stroke proportional relationship. High pressure cut-off Industrial Valves open or close the valve stem travel relatively short, and very reliable cutting function, and because of seat disc with the change of channel directly proportional relationship, is very suitable for the traffic regulation. Therefore, the cut-off valve type of valve is well suited for use as cut off or adjust and throttling. The disc casting cut-off valve open and close the trip between small, and can withstand the opening and closing on sealing surface, therefore, a cut-off Industrial Valves is suitable for the need to frequently switch situation, can be used in most of the medium flow in the system. Globe valves are widely used in petrochemical, electric power, metallurgy, urban construction, chemical industry, etc. 2, the structure characteristics of the high pressure cut-off valve casting: ( 1) National standard flange connection, socket connection, butt welding, threaded connections cut-off valve series is referring to the normal product of national standard design, cast steel globe valve series product structural design is reasonable, stable performance, reliable quality, easy installation, flexible operation of the light, etc. ( 2) The disc and seat sealing surface with different hardness of hard alloy spray welding and into. Sealing is reliable, high hardness; Wear resistant high temperature resistance, good abrasion resistance, long service life. ( 3) Stem after heat treatment, with good abrasion resistance and abrasion resistance. ( 4) Can use a variety of connection types, meet the requirements of a variety of piping and piping flange and flange sealing surface forms, can meet the needs of all kinds of engineering and the user requirements. 3, the high pressure casting material selection of globe valve seal: carbon steel globe valve: the valve disc 13 cr and seat for WCB + HF, WC6 + HF or LCC + HF, the poor hardness HB 50 or more. The spray welding process, spray welding process in strict accordance with the regulations. 304 or 316 stainless steel globe valve: disc, seat OCr18Ni9 + HF or OCr17Ni12Mo2 + HF, the poor hardness HB 50 or more. Disc and seat sealing surface hardness is higher with good erosion resistance, corrosion resistance, spray welding process, in strict accordance with the spray welding procedure is carried out. 4, the high pressure casting cut-off valve material: 4. 1 valve body, valve cover, material for WCB, WC6, LCC, OCr18Ni9 or OCr17Ni12Mo2. For the valve material strictly according to GB/T12224 'the general requirements of steel valves and valve material standards to choose, and ensure the service life. Casting materials in line with the GB/T12229 'general carbon steel valve casting technical conditions', GB/T12230 general stainless steel valve casting technical conditions and JB/T7248 'Industrial Valves with low temperature steel casting technology conditions' the standard stipulated in the request. Casting parts according to the standard requirements for heat treatment, mechanical properties to meet the standard requirements. Nondestructive testing of pressure steel standards JB/T6440 valve compression casting steel radiographic inspection. All pressure forging JB4726-4728 'pressure vessel steel forgings' regulation requirements. All report on file, in order to accept the buyer's inspection in the production of valves. 4. 2 stem material for 13 cr, 304 or 316. Stem material according to the relevant valves standard for chemical analysis, mechanical performance report ( Tensile test, hardness test) , according to the requirements for heat treatment, and provide and report. All report on file, in order to accept the buyer's inspection in the production of valves. 5, high pressure casting of cut-off valve inspection and test 5. 1 test standard valve of inspection and test to perform to standard JB/T9092 and GB/T12224. Casing pressure test before the valve surface treatment and painting. 5. Before they leave 100% pressure test 2 of the valve, the valve pressure testing at least include the following content. — On shell test and seal test, low pressure gas seal, high pressure water seal test and other test code. 5. 3 after the test, row of net body of test medium. 5. 4 all butt weld 100% X-ray inspection. For PN160 valve pressure and above classes according to JB/T6440 do X-ray inspection. 5. 5 products use units shall have the right at any time according to the need for inspection. 6, high pressure cut-off valve actuator: 6. 1 according to the operation condition of the cut-off valve, the valve operating mechanism will have enough torque and stiffness. 6. 2 operating mechanism of bearing shell and connected with the body parts have enough stiffness and strength requirements. 6. The biggest force 3 artificial operating mechanism handwheel for 35 KGF ( Any conditions) 。 drive mechanism full stroke smooth operation, no jamming, no beat phenomenon, adjustment of high precision, accurate.
Shenzhen Mech Valve Trading Co., Ltd. have now make a decision to enlarge our company in other countries.
Shenzhen Mech Valve Trading Co., Ltd. is a rapidly growing Manufacturing Company based in China. We offer a wide range of equipment that helps in y gate valve which are safe, durable and economical. We provide wedge gate valve, os&y valve, cast iron gate valve,etc. more about and double flanged gate valve solutions are covered in Mech Valve. Take a visit!
Our company is professional in selling resilient wedge gate valve as well as providing a series of relevant services.
When selecting the best products for customers, we considered not only the gate valve, but also the resilient seated valve.
We persevere in keeping the customers pleasant and supporting them with water gate valve at a reasonable price.