* Introduction * Table of Dimension * Flow curves * Ordering System
 
TECHNICAL DATA

 Series

 CV

End Connection Size

 1/8",1/4"6mm

3/8",1/2",5/8" 10mm,12mm

3/4" & 1"

Nominal Cracking Pressure

A1/3,1,10 & 25psig (0.02,0.06,0.7 & 1.76kg/)

Maximum

Working Pressure 

@ 70(21)

3000 psig (211 kg/)

Brass:1500psig

(105.48 kg/)

316ss:2000psig

(140.64 kg/)

Maximum

Back Pressure

@ 70(21)

1000 psig(70.32 kg/)for craking pressures less than 10 psig (0.7 kg/) 3000 psig (211 kg/) for all other cracking pressures

200 psig (14.06 kg/)

200 psig (14.06 kg/)

Flow Coefficient(Cv)  (see Flow Curves)

1/8"T - 0.10

1/4"T - 0.47

3/8"T - 1.47

1/2"T &

5/8"T - 1.68

3/4"T & 1"T - 4.48

Temperature Rating

Viton : -10 to 375(-23 to 191)

Buna N : -10 to 250(-23 to 121)

Features

Every valve is factory tested for cracking and reseal performance.

CLEANING

Each valve is cleaned and packaged according to the company standard cleaning procedures.

TESTING

Each valve is tested with air for cracking and reseal performance.

Hydrostatic  shell  test is performed  at  1.5 times the working pressure.

 

Valve Body Materials

316SS

Brass

Alloy 400 (1/4"to1/2"T Only)

Grade/ATSM Specification

1. Inlet Body

316SS/A276

Brass 360/B16

Alloy 400/B164

2. O-Ring

Viton

Buna N

Viton

3. Poppet

316SS/A276

Brass 360/B16

Alloy 400/B164

4. Spring

302SS/A313

Alloy 400/B164

5. outlet Body

316SS/A276

Brass 360/B16

Alloy 400/B164

 

CRACKING PRESSRUE & RESEAL PRESSURE

CV Series Valves with nominal cracking pressure of 8 psig (0.55 kg/) or lower may require back pressure to reseal bubble - tight.

 
Actual pressure, kg/ @21

Example : For a valve with a spring having a nominal cracking pressure of 25 psig, the actual cracking pressure ranges between 20 and 28 psig. The minimum reseal pressure is 16 psig.

Valves which are not actuated for a period of time may initially crack at higher than subsequent cracking pressures.

Cracking pressure - The upstream pressure at which the first indication of flow occurs.

Reseal Pressure - The upstream pressure at which the valve closes bubble - tight.