|   |   |   | 
Constant Pressure Valve

Constant Flow Rate Valve
UFSJ type
(PAT.)

Unique pilot mechanism provides excellent constant flow rate regulation

The unique pilot valve operation exhibits excellent constant flow characteristics.

Variable constant flow rate regulating function may be added for flow rate control over a wide range, allowing effective use and stable supply of water (optional).

The pilot valve does not have any minute, fixed restriction passage like a needle valve, and is therefore clog-resistant.
And, even if clogging by foreign material occurs, the built-in self-cleaning mechanism causes the clogged valve part to open automatically to remove the foreign material.

Due to its simple construction, troublesome adjustments are unnecessary. Being excellent in durability and practically maintenance-free, using this valve reduces maintenance costs.


Constant Flow Rate Valve

Patented in Japan, U.S.A., other

Bore

80-600mm

Rated pressure

1MPa


1.

An orifice is provided at the inlet side of the valve, and differential pressure (P1-P1') that arises between the front and the rear of the orifice due to the flow rate fluctuation drives the pilot valve, thereby opening and closing the main valve and maintaining the set flow rate.

2.

The pilot valve operates in the same manner as in the Constant Pressure Valve, with intermediate pressure Pe being formed by the actions of pilot A valve and pilot B valve. This intermediate pressure is transmitted to the top of the main valve for automatic adjustment of the main valve opening.

3.

The set flow rate can be finely adjusted with the coil spring of the pilot valve. If flow rate control over a wide range is required, a butterfly valve or other flow rate adjustment valve (optional) may be installed in place of the fixed orifice.


Specifications/Performance

Inlet pressure (Primary pressure)
Max. 1MPa (For JIS 10K standard)

Operating differential pressure
0.1MPa or more


Flow rate characteristics when the opening of the butterfly valve
(installed in place of the inlet side orifice) is adjusted
Constant Flow Rate Valve / Flow rate characteristics

Flow rate characteristics when the inlet pressure fluctuates
Constant Flow Rate Valve / Flow rate characteristics


Selection chart/Outer dimensions

Please refer to Common specifications & Outer dimensions.



If required bore size is 600mm or less, a direct-operation type constant flow regulator valve that operates without a pilot valve is also available and is generally more economical.
For details, please refer to Constant Flow Regulator Valve UF series.


>Back to Top
Online Exhibition
 
Solutions
Defoaming, Degassing
Aquarium
Irrigation Water Supply
Water & Sewerage
Water Distribution
Iron & Steel Works
Tanker Cargo Handling
Construction
Seawater Intake
Slurry Self-Priming
Snow Removal
Undersea Tunnel
 
Quick Navigator
Pumps
Self-Priming Centrifugal Pump
Defoaming, Degassing Pump
Enhanced Self-Priming Pump
Multistage Self-Priming Pump
Turbine Pump
Process Pump
Centrifugal Pump
Multistage Centrifugal Pump
Double Suction Volute Pump
Mixed-Flow Volute Pump
 
 
 
 
 
Valves
Non-Water Hammer Check
Valve
Wafer-Type Check Valve
Constant Flow Valve
Float-Type Regulator Valve
Pilot-Type Regulator Valves
 Constant Pressure Valve
 Constant Flow Rate Valve
 Liquid Level-1/Level-2
 Regulator Valve
 Safety Valve
 Pressure Sustaining Valve
 Differential Pressure
 Regulator Valve
 Emergency Shutoff Valve
Special Alloys, Parts
Special Stainless Steel
Seawater Resistant
Stainless Steel
Casting Parts
Non-External-Flushing
Mechanical Seal
 
About Us
Company Profile
Contact Address
Plant Tour
Company History
Our Clients
Media Coverage
 
Contact Us
(C) 2001 Yokota Manufacturing Co., Ltd. Tel. +81 82-241-8672 Terms of Use