ZZY series self operated pressure regulating valveDetailed product description：

ZZY type self operated pressure regulating valve does not require external energy. It uses the energy of the regulated medium as a power source, introduces an actuator to control the position of the valve core, changes the pressure difference and flow rate at both ends, and stabilizes the pressure before (or after) the valve. It has the advantages of sensitive action, good sealing, and small pressure set point fluctuations, and is widely used in automatic control of pressure reduction and stabilization or release and stabilization of gas, liquid, and steam media.

The ZZY series self operated pressure regulating valve has three structures: single seat (ZZYP), sleeve (ZZYM), and double seat (ZZYN); There are two types of actuators: membrane type and piston type; The types of action include pressure regulation after the pressure reducing valve (Type B) and pressure regulation before the pressure relief valve (Type K). The nominal pressure rating of the product includes PN16, 40, and 64; Valve body diameter range DN20~300; There are three levels of leakage: Level II, Level IV, and Level VI; The traffic characteristic is fast opening; The pressure is adjusted in stages from 15 to 2500 kPa. Can be combined as needed to meet user operating requirements.

Product Features
·Self operated pressure regulating valves do not require external energy and can work in places without electricity or gas, which is both convenient and energy-saving.
·The pressure segmentation range is fine and intersecting with each other, with high adjustment accuracy.
·The pressure setting value can be continuously set during operation.
·Adjust the pressure behind the valve, with a ratio of 10:1 to 10:8 between the pressure before and after the valve.
·Rubber diaphragm type detection, with high precision and sensitive action of the actuator detection.
·Adopting a pressure balance mechanism to make the regulating valve responsive and precise in control.

Valve body: ZG230-450 ZG1Cr18Ni9Ti ZGOCr18Ni12M02Ti
Valve core: 1Cr18Ni9Ti 0Cr18Ni12M02Ti
Valve seat: 1Cr18Ni9Ti 0Cr18Ni12M02Ti
Valve stem: 1Cr18Ni9Ti 0Cr18Ni12M02Ti
Membrane cover: A3 A3 steel coated with tetrafluoroethylene stainless steel
Packing: PTFE flexible graphite
Rubber film: nitrile, ethylene propylene, fluorine, oil resistant rubber

Nominal diameter DN (mm)

twenty

twenty-five

thirty-two

forty

fifty

sixty-five

eighty

one hundred

one hundred and twenty-five

one hundred and fifty

two hundred

two hundred and fifty

three hundred

Rated flow coefficient (KV)

seven

eleven

twenty

thirty

forty-eight

seventy-five

one hundred and twenty

one hundred and ninety

three hundred

four hundred and eighty

seven hundred and sixty

one thousand and one hundred

one thousand seven hundred and fifty

Rated stroke (mm)

eight

ten

fourteen

twenty

twenty-five

forty

fifty

sixty

seventy

Nominal pressure PN (Mpa)

1.6, 4.0, 6.4

Pressure regulation range (K P a)

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 980～1500 1000～2500

Flow characteristics (℃)

Quick open

Adjustment accuracy (%)

±5

Operating temperature (℃)

≤350

Allowable leakage amount

Hard seal (1/h)

Single seat: ≤ 10-4 valve rated capacity (Class IV); Double seat, sleeve: ≤ 5 × 10 ˉ 3 valve rated capacity (Class II)

Soft seal (m1/h)

zero point one five

zero point three zero

zero point four five

zero point six zero

zero point nine zero

one point seven

four

six point seven five

eleven point one zero

sixteen

Pressure reduction ratio

maximum

ten

minimum

one point two five