Standard:
ANSI B16.5,ANSI B16.47,ANSI B16.48, ANSI B16.36, MSS SP-44
EN1092-1 BS 4054
DIN2632 PN10 WNRF
Size: 1/2''~60''
Class Rating: 150~2500
Facing: RF(raised face);FF(flat face);RTJ(ring type joint);RJ(ring joint face)
TG(tongue and groove face);MFM(male and female face)
Manufacturing process: Push, Press, Forge, Cast, etc.
Material:
Carbon steel:
ASTM A105;
ASTM A266 GR.1,GR.2,GR.3,GR.4
Stainless steel:
304/SUS304/UNS S30400/1.4301
304L/UNS S30403/1.4306;
304H/UNS S30409/1.4948;
309S/UNS S30908/1.4833
309H/UNS S30909;
310S/UNS S31008/1.4845;
310H/UNS S31009;
316/UNS S31600/1.4401;
316Ti/UNS S31635/1.4571;
316H/UNS S31609/1.4436;
316L/UNS S31603/1.4404;
316LN/UNS S31653;
317/UNS S31700;
317L/UNS S31703/1.4438;
321/UNS S32100/1.4541;
321H/UNS S32109;
347/UNS S34700/1.4550;
347H/UNS S34709/1.4912;
348/UNS S34800;
Alloy steel:
ASTM A694 F42/F46/F48/F50/F52/F56/F60/F65/F70;
ASTM A182 F5a/F5/F9/F11/F12/F22/F91;
ASTM A350 LF1/LF2/LF3;
Duplex steel:
ASTM A182 F51/S31803/1.4462;
ASTM A182 F53/S2507/S32750/1.4401;
ASTM A182 F55/S32760/1.4501/Zeron 100;
2205/F60/S32205;
ASTM A182 F44/S31254/254SMO/1.4547;
17-4PH/S17400/1.4542/SUS630/AISI630;
F904L/NO8904/1.4539;
725LN/310MoLN/S31050/1.4466
253MA/S30815/1.4835;
Nickel alloy steel:
Alloy 200/Nickel 200/NO2200/2.4066/ASTM B366 WPN;
Alloy 201/Nickel 201/NO2201/2.4068/ASTM B366 WPNL;
Alloy 400/Monel 400/NO4400/NS111/2.4360/ASTM B366 WPNC;
Alloy K-500/Monel K-500/NO5500/2.475;
Alloy 600/Inconel 600/NO6600/NS333/2.4816;
Alloy 601/Inconel 601/NO6001/2.4851;
Alloy 625/Inconel 625/NO6625/NS336/2.4856;
Alloy 718/Inconel 718/NO7718/GH169/GH4169/2.4668;
Alloy 800/Incoloy 800/NO8800/1.4876;
Alloy 800H/Incoloy 800H/NO8810/1.4958;
Alloy 800HT/Incoloy 800HT/NO8811/1.4959;
Alloy 825/Incoloy 825/NO8825/2.4858/NS142;
Alloy 925/Incoloy 925/NO9925;
Hastelloy C/Alloy C/NO6003/2.4869/NS333;
Alloy C-276/Hastelloy C-276/N10276/2.4819;
Alloy C-4/Hastelloy C-4/NO6455/NS335/2.4610;
Alloy C-22/Hastelloy C-22/NO6022/2.4602;
Alloy C-2000/Hastelloy C-2000/NO6200/2.4675;
Alloy B/Hastelloy B/NS321/N10001;
Alloy B-2/Hastelloy B-2/N10665/NS322/2.4617;
Alloy B-3/Hastelloy B-3/N10675/2.4600;
Alloy X/Hastelloy X/NO6002/2.4665;
Alloy G-30/Hastelloy G-30/NO6030/2.4603;
Alloy X-750/Inconel X-750/NO7750/GH145/2.4669;
Alloy 20/Carpenter 20Cb3/NO8020/NS312/2.4660;
Alloy 31/NO8031/1.4562;
Alloy 901/NO9901/1.4898;
Incoloy 25-6Mo/NO8926/1.4529/Incoloy 926/Alloy 926;
Inconel 783/UNS R30783;
NAS 254NM/NO8367;
Monel 30C
Nimonic 80A/Nickel Alloy 80a/UNS N07080/NA20/2.4631/2.4952
Nimonic 263/NO7263
Nimonic 90/UNS NO7090;
Incoloy 907/GH907;
Nitronic 60/Alloy 218/UNS S21800
This flange is circumferentially welded into the systemat its neck which means that the integrity of the buttwelded area can be easily examined by radiography. The bores of both pipe and flange match, which Reduces turbulence and erosion inside the pipeline. The weld neck is therefore favoured in critical applications
Weld Neck Flange,RF Flange,Weld Neck Pipe Flange,Stainless Steel Flange He Bei GuangHao Pipe Fittings Co .,LTD (Cangzhou Sailing Steel Pipe Co., Ltd) , https://www.guanghaofitting.com
DIN2633 PN16 WNRF
DIN2634 PN25 WNRF
DIN2635 PN40 WNRF
Automatic constant pressure valve and electric control valve performance
Automatic constant pressure differential valve + electric control valve is currently used to solve the balance of air conditioning water system is a very good way, when the system pressure changes, the constant pressure valve can be changed by its own flow area so that the electric control valve at both ends The pressure remains the same, so that the CV value of the control valve is always one, so as to ensure that the electric control valve has been running in the best conditions, the real change in water temperature and has nothing to do with the pressure, you can guarantee access to air conditioning The tank of water is the amount of water you need at any one time. Plexus makes the system more superior performance, more convenient to maintain. The use of an automatic constant pressure differential valve + electric control valve at the end of the system eliminates the need for extensive use of balancing valves in stratified control, which results in superior system performance and easier maintenance. Automatic constant pressure differential valve + electric control valve is a variable flow air conditioning water system, an important guarantee for hydraulic balance, the system uses automatic balance proportional integral control valve can bring you many benefits. 1. Because there is no need for system debugging, so save a lot of trouble, save a lot of time and shorten the completion date; 2. You do not have to use the valve group and the valve for hierarchical control, so you save more pipe , Insulation materials and installation costs and time; 3. The water system is always in balance, so regardless of the installation of staged construction or equipment will not affect the balance of the water system. 4. Even after the project or put into operation due to Changes to certain uses that require changes in the design of water systems in certain areas will not affect the design of water systems in other areas and will not affect the water system balance in other areas 5. As the entire system is in a state of dynamic equilibrium, The pump will be the most energy-saving operation, saving a lot of operation and maintenance costs. 6. Because the system flow balance is automatic, so that the installation and maintenance more convenient and eliminate the possibility of human error undermining the balance may be. Integral control valve and the static balance valve comparison Static balance valve is actually a human can accurately set the opening of the valve, he Through artificially adjusting the local resistance to solve the problem of the water balance of the line section of the air conditioning system. At the beginning of the system commissioning, all the valves of the system are at a certain opening. The commissioning personnel set the opening of each static balance valve one by one according to the original mathematical model (the valve opening is set to a certain value after setting) , But for different water systems its resistance distribution curve is definitely not the same, and it can not be measured. Therefore, the static balance valve can only fuzzy, qualitative control of water flow. For a variable flow air conditioning water system, each air conditioning tank of water changes are random, the entire pipeline pressure changes are unpredictable, the valve opening is also random changes. Therefore, we can get from the formula G (flow) = CV * A (valve flow area) * â–³ P (pressure difference between the two ends of the valve): Since the static balance valve is adjusted, the opening degree is constant. Therefore, changes in the pressure differential across the valve will inevitably result in changes in the flow through the static balance valve. So in a variable flow system when the system pressure changes when the static balance valve is unable to solve the problem of hydraulic imbalance. Will still cause the system over-current and under-current