Overview
The ZZY self-operated pressure regulating valve is an energy-saving pressure regulating valve that does not require external energy and only relies on the pressure change of the medium to be adjusted to automatically adjust and stabilize the front (or post-valve) pressure. The valve is an ideal energy-saving product. It is widely used for the pressure and stability of steam. It is also suitable for non-corrosive gases. The pressure of the low-viscosity liquid medium before the valve is not more than 1.6MPa.
The main technical parameters
Valve body
Type: Straight-through casting ball valve
Nominal diameter: DN20～300
Nominal pressure: PN1.6MPa, PN4.0MPa, PN6.3MPa
ANSI Class 125, 150, 300, 600
Connection type: flange type PN16 convex surface PN40, 63 convex and concave surface
Body and bonnet material: WCB (SCPH2)
CF8 (304), CF8M (316)
Internal parts material: CF8 (304), CF8M (316)
Applicable temperature: normal temperature type -40～230°C
Medium temperature type -40～450°C
Gland type: bolt compression type
Filling: V-type PTFE packing
Flexible graphite filler
In-valve assembly
Spool type: single seat plunger type spool
Pressure balanced type high capacity spool
Double seat plunger type spool
Flow characteristics: quick opening
Sealed version: metal seal, soft seal
Executive agency
Ensure the normal working pressure of the valve is the minimum pressure difference △P≥0.04MPa
Type: Membrane type (for adjusted pressure ≤0.6MPa)
ZY70, ZY100, ZY200, ZY280, ZY400
Signal interface: internal thread M16×1.5
Ambient temperature: -40 to +70 °C
Valve function: valve front, rear valve
Flow coefficient CV value and stroke
| DN(mm) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CV | 7 | 11 | 20 | 30 | 48 | 75 | 120 | 190 | 300 | 480 | 760 | 1100 | 1750 |
| Rated stroke mm |
8 | 8 | 10 | 10 | 14 | 20 | 20 | 25 | 40 | 40 | 50 | 60 | 70 |
