Self-Acting Pressure Regulating Valve
A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category.
Key words:
Classification:
Control valve
Description
A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category. The valve may be operated manually or with a hand wheel, handle or pedal, and may also be controlled to vary the pressure, temperature and flow rate of the fluid medium. The valve can perform continuous or repeated operations on these changes, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as required by external inputs (I. e., to adjust the changing set point of the flow through the pipeline). The automatic control valve does not need to be manually operated according to its input and setting, so that the valve can accurately control the various requirements of the fluid medium. Valves can also be divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard customized valve materials, etc.
Product Overview
The ZZY series self‑acting pressure regulating valves require no external power source; they harness the energy of the controlled medium itself to drive the actuator, which adjusts the position of the valve plug to vary the flow area, thereby modulating the pressure differential and flow rate across the valve and maintaining the upstream (or downstream) pressure at a setpoint. Featuring sensitive response, excellent sealing, and minimal pressure fluctuations, these valves are widely employed in industrial equipment for automated control of pressure reduction, pressure stabilization, or pressure relief in gas, liquid, and steam service.
Main Technical Parameters and Performance Specifications
| Nominal diameter | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
| Rated flow coefficient (Kv) | 7 | 11 | 20 | 30 | 48 | 75 | 120 | 190 | 300 | 480 | 760 | 1100 | 1750 | |
| Rated Stroke (mm) | 8 | 10 | 14 | 20 | 25 | 40 | 50 | 60 | 70 | |||||
| Nominal pressure (MPa) | 1.6, 4.0, 6.4 | |||||||||||||
| Pressure Regulation Range (kPa) | 15~50 40~80 60~100 80~140 120~180 160~220 200~260 240~300 280~350 330~400 380~450 | |||||||||||||
| 430~500 480~560 540~620 600~700 680~800 780~900 880~1000 600~1500 1000~2500 | ||||||||||||||
| Flow characteristics | Quick open | |||||||||||||
| Adjustment accuracy (%) | ±5 | |||||||||||||
| Medium used | Hot water, steam, various gases, and low-viscosity media | |||||||||||||
| Operating temperature (°C) | -20~80, -20~350 | |||||||||||||
| Permissible leakage amount | Hard seal (mL/h) | Single-seat: ≤10~4 times the valve rated capacity (Class IV); double-seat, sleeve-type: ≤5×10~3 times the valve rated capacity (Class II). | ||||||||||||
| Soft seal (mL/h) | 0.15 | 0.3 | 0.45 | 0.6 | 0.9 | 1.7 | 4 | 6.75 | 11.1 | 11.6 | ||||
| Pressure reduction ratio | Maximum | 10 | ||||||||||||
| smallest | 1.25 | |||||||||||||
Material of Main Components
| Valve body material | WCB, WCC, WC6, WC9, LCB, CF3, CF8, CF3M, CF8M | ||||
| Valve core | Material | 304/316 | 304/316 | 304/316 | 304/316 |
| Processing | RPTFE | Rubber | ST | SS | |
| Valve seat | Material | 304/316 | 304/316 | 304/316 | 304/316 |
| Processing | RPTFE | - | ST | SS | |
| Permissible leakage amount | Level | Level IV / V / VI | Level IV / V / VI | Grade IV / V | Grade IV / V |
| Adopting standards | GB/T4213, ANSI | ||||
| Operating temperature (°C) | WCB, WCC | -5~+160 | -20~+100 | -5~+425 | -5~+425 |
| WC6,WC9 | -5~+160 | -20~+100 | -5~+538 | -5~+538 | |
| LCB | -45~+160 | -20~+100 | -45~+340 | -45~+340 | |
Main external dimensions Unit: mm
ZZYP-16C/P
| Nominal diameter DN (mm) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | ||
| Flange connection size | 383 | 512 | 603 | 862 | 1023 | 1380 | 1800 | 2000 | 2200 | ||||||
| Flange face-to-face distance (L) | 181 | 184 | 200 | 222 | 254 | 276 | 298 | 352 | 410 | 451 | 600 | 650 | 740 | ||
| Pressure Regulation Range (kPa) | 15–140 | H | 475 | 520 | 540 | 710 | 780 | 840 | 880 | 915 | 940 | 1000 | |||
| A | 280 | 308 | |||||||||||||
| 130–300 | H | 455 | 500 | 520 | 690 | 760 | 800 | 870 | 880 | 900 | 950 | ||||
| A | 230 | ||||||||||||||
| 280–500 | H | 450 | 490 | 510 | 680 | 750 | 790 | 860 | 870 | 890 | 940 | ||||
| A | 176 | 194 | 280 | ||||||||||||
| 480–1000 | H | 445 | 670 | 740 | 780 | 850 | 860 | 880 | 930 | ||||||
| A | 176 | 194 | 280 | ||||||||||||
| 600–1500 | H | 445 | 570 | 600 | 820 | 890 | 950 | 1000 | 1100 | 1200 | |||||
| A | 85 | 96 | |||||||||||||
| 1000–2500 | H | 445 | 570 | 600 | 820 | 890 | 950 | 1000 | 1100 | 1200 | |||||
| A | 85 | 96 | |||||||||||||
| Weight (kg) | 26 | 37 | 42 | 72 | 90 | 114 | 130 | 144 | 180 | 200 | 250 | ||||
| Pressure-tapping pipe fitting thread | M16×1.5 | ||||||||||||||
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