Pressure Reducing Valves

Pressure Reducing Valves

The 90 Series Pressure Reducing/Pressure Regulating Valve (PRV) automatically reduces a higher inlet pressure to a steady lower downstream pressure, regardless of changing flow rate and/or varying inlet pressure. Cla-Val’s PRVs are installed in water distribution systems throughout the world and are know for their superior performance, reliability and long service life.  There are many variations on the basic pressure reducing valve, including but not limited to the following.

  • 90-01H with X43H H-Style Strainer
  • 90-01KO PRV with KO Anti-Cavitation Trim
  • 90-48 PRV with Low Flow Bypass
  • 92-01 Combination Pressure Reducing and Sustaining
  • 93-01 Pressure Reducing and Solenoid Shut-Off
  • 94-01 Combination Pressure Reducing and Surge Control
  • 390 Series Electronic Pressure Reducing

PRODUCTS

Cla-Val Models 90-01 and 690-01 Pressure Reducing Valves automatically reduce a higher inlet pressure to a steady lower downstream pressure, regardless of changing flow rate and/or varying inlet pressure. Each valve is an accurate, pilot-operated regulator capable of holding downstream pressure to a pre-determined limit. When downstream pressure exceeds the pressure setting of the control pilot, the main valve and pilot valve close drip-tight.

Model 90-01 is the full port version while Model 690-01 is the reduced port version of Cla-Val’s iconic Pressure Reducing Valve.

Engineering Data Sheets

The Cla-Val Model 90-01KO Hytrol Pressure Reducing Valve with Anti-Cavitation Trim automatically reduces a higher inlet pressure to a steady lower downstream pressure, regardless of changing flow rate and/or varying inlet pressure. The valve is equipped with Anti-Cavitation Trim to provide for optimum downstream pressure control while reducing noise and eliminating damage associated with cavitation.

Engineering Data Sheets

The Cla-Val Model CRD-L Pressure Reducing Valve automatically reduces a higher inlet pressure to a steady lower downstream pressure with our unique design. This valve is an accurate regulator capable of holding downstream pressure to a predetermined amount, regardless of upstream pressure fluctuations.

Typical Applications

  • High rise buildings: Use CRD-L Pressure Reducing Valves in various water systems (potable water, boiler feed air conditioning, etc.) to control pressure fluctuations between floors.
  • Industrial plants: Use CRD-L Pressure Reducing Valves between a high pressure supply system and equipment requiring lower pressure. Typically CRD-L Pressure Reducing Valves are used at supply connections for water heaters, boiler feed water or other process water systems.
  • Municipal water systems: Use CRD-L Pressure Reducing Valves at service connections in a high pressure distribution zone. Depending on flow requirements, CRD-L’s may be installed in parallel. One CRD-L provides desired outlet pressure while the second CRD-L handles low flow conditions. If necessary, additional CRD-L’s can be added for more flow capacity. The CRD-L is also ideal for a low flow bypass around a larger Cla-Val 90 Series Pressure Reducing Valve.
Engineering Data Sheets
Cla-Val Models 390-02 and 3690-02 Electronic Actuated Pressure Reducing Control Valves combine precise control of field proven Cla-Val hydraulic pilots and simple, remote valve control.  Models 390-02 and 3690-02 Pressure Reducing Valves automatically reduce a higher inlet pressure to a steady lower downstream pressure regardless of changing flow rate and/or varying inlet pressure.
These valves are accurate, pilot-operated regulators capable of holding downstream pressure to a pre-determined limit.  The valves uses a CRD-34 pilot control, consisting of a hydraulic pilot and integral controller, that accepts a remote set-point command input and makes set-point adjustments to the pilot.
The valves are designed to be used with supervisory control systems (SCADA), having remote analog set-point output and process variable upstream pressure input using the VC-22D Electronic Valve Controller as the interface. Cla-Val 390 Series Valves are an effective solution for lowering costs associated with “confined space” requirements by eliminating the need for entry in valve structure for set-point adjustment. They are also ideal for pressure management, and can be programmed to minimum night time and optimum daytime pressures.
Engineering Data Sheets

The Cla-Val Model 92-01 and 692-01 Combination Pressure Reducing and Pressure Sustaining Valve automatically performs two independent functions. It maintains a constant downstream pressure, regardless of fluctuating demand and sustains the upstream pressure to a pre-determined minimum.

A Combination Pressure Reducing and Pressure Sustaining Valve is typical used to automatically reduce pressure for the downstream distribution network and sustain a minimum pressure in the high pressure main regardless of distribution demand.
Engineering Data Sheets

Cla-Val Models 92-07 (full port) / 692-07 (reduced port) Combination Pressure Reducing, Pressure Sustaining and Solenoid Control Valves automatically perform three independent functions:

  1. Maintains a constant downstream pressure
  2. Sustains upstream pressure
  3. Utilizes a solenoid override to shut the valve drip-tight
Engineering Data Sheets

The Cla-Val Models 93-01 and 693-01 Combination Pressure Reducing and Solenoid Shut-Off Valves automatically reduce higher inlet pressure to a steady lower downstream pressure.

Use this valve to reduce high transmission line pressures to lower distribution system levels, while opening and closing on command. The solenoid control feature can be activated by an electrical signal from a timer or programmer.
In Fire Service applications, the 93-01/693-01 can be installed in a distribution line where there is a need to close the valve on the starting of a fire pump. The solenoid control is activated on pump start-up and closes the valve.
Engineering Data Sheets

The Cla-Val Model 90-05 Pressure Reducing Valve is a full port valve that automatically reduces a higher inlet pressure to a steady lower downstream pressure, regardless of changing flow rate and/or varying inlet pressure. This valve is an accurate, pilot-operated regulator capable of holding downstream pressure to a pre-determined limit. When downstream pressure exceeds the pressure setting of the control pilot, the main valve and pilot valve close drip-tight. A CDC/CSC check valve is included to allow return flow when outlet pressure is greater than inlet pressure.  The 690-05 is the reduced port version of the the 90-05.

Engineering Data Sheets

The Cla-Val Model 90-48 and 690-48 Pressure Reducing Valves are equipped with Low Flow By-Pass to automatically reduce a higher inlet pressure to a steady lower downstream pressure, regardless of changing flow rate. The low flow by-pass capability is achieved by using the Cla-Val Model CRD-L Direct Acting Pressure Reducing Valve as an integral part of the main valve. By doing this, space is saved and installation and maintenance become much easier.

Engineering Data Sheets

The Cla-Val Models 590-01 and 6590-01 Pressure Reducing Valves automatically reduce a higher inlet pressure to a steady lower downstream pressure regardless of changing flow rate and/or varying inlet pressure. All metal parts are 316 Stainless Steel for high corrosion resistance in many industrial applications.

Engineering Data Sheets

The Cla-Val Models 94-01 and 694-01 Combination Pressure Reducing and Surge Control Valves automatically reduce a higher inlet pressure to a steady lower downstream pressure. When downstream pressure rapidly exceeds the pressure setting of the pressure reducing control pilot, the surge pilot (CRL) will open quickly to prevent a rapid pressure rise downstream (i.e. surge condition).

Engineering Data Sheets

The Cla-Val Model 95-01/695-01 Ratio Reduction Control Valve automatically reduces a higher inlet pressure to a lower outlet pressure at a fixed ratio within certain range of flow rate.  It is simple in design for long service life featuring double control chambers for precise diaphragm actuation.

Engineering Data Sheets

The Cla-Val Model 90-37/690-37 Pressure Reducing Valve automatically reduces a higher inlet pressure to a steady lower downstream pressure, regardless of changing flow rate and/or varying inlet pressure.

Engineering Data Sheets

The Cla-Val Model 90-99 Pressure Reducing Valve with Low Flow By-Pass automatically reduces a higher inlet pressure to a steady lower downstream pressure, regardless of changing flow rate.  The low flow by-pass capability is achieved by using a 2” grooved end 90-01 Pressure Reducing Valve as an integral part of the main valve.  This compact design saves space and makes for an easier installation process.

Engineering Data Sheets

Cla-Val Models 94-22 & 694-22 Combination Pressure Reducing and Surge Control Valves automatically reduces a higher inlet pressure to a pre-determined  lower downstream pressure, regardless of changing flow rate and/or varying inlet pressure. When downstream pressure rapidly exceeds the pressure setting of the pressure reducing control pilot, the surge pilot (CRL-60) will open quickly to prevent a rapid pressure rise downstream.

Engineering Data Sheets

The Cla-Val Models 94-58 and 694-58 Combination Pressure Reducing & Surge Control Valvea with Solenoid Override consist of a Cla-Val Hytrol main valve, a reducing control and a solenoid control connected to the main valve. The solenoid override is used to close the valve and downstream pressure relief pilot. This valve automatically reduces higher inlet pressure to a steady lower downstream pressure, regardless of changing flow rate and/or varying inlet pressure.

Engineering Data Sheets

Cla-Val Model 790-01 automatically controls downstream pressure, from no flow to full open flow, without regard to changes in inlet pressure.  Outlet pressure control is smooth and precise since the friction and hysteresis of the valve and pilot is negligible. Because the valve will not chatter or slam under low flow conditions, it is not necessary to parallel Cla-Val Model 790-01 with a second smaller size control valve to obtain accurate pressure control at low flow rates. In any size, Cla-Val Model 790-01 will control pressure right down to shutoff.

The main valve consists of only two parts: a stainless steel body, and an elastomeric liner or control element.

Engineering Data Sheets