Advertisement

Quick Links

CVS Series DBQ and DBAQ
Control Valves
Introduction
Contained in this manual are installation
instructions, maintenance and parts
information for the CVS DBQ and DBAQ Control
Valves. Refer to the appropriate manuals for
instructions for the accompanying actuator,
positioner and additional accessories.
Only trained or experienced personnel should
carry out the operation and installation of all
pressure equipment. If you have any questions
regarding the equipment, contact your CVS
Controls representative.
Applications and Features
The CVS Series DBQ and DBAQ Control Valves
are ideally suited for high pressure water and
steam applications, providing excellent pressure
and flow control. This design may be utilized in
both high pressure and high temperature
control service.
CVS Series DBQ is a globe style valve, while the
CVS Series DBAQ is an angle style valve, which
may be used in angle piping or self draining
applications.
Head Office
3900 101 Street
Edmonton, Alberta
T6E 0A5
Canada
Office: (780) 437-3055
Fax: (780) 436-5461
Website:
www.cvs-controls.com
INSTRUCTION MANUAL
Figure 1: 2" CVS Series DBAQ
Valve bodies are available in 1 or 2 inch sizes,
with casted flanged connections, and ASME
body ratings of Class 1500, or Class 2500. LCC,
WCB and CF8M are standard body materials.
Additional materials may be available upon
request.
Sour Service Capability
Optional NACE MRO175/ISO 15156-2009
Flow Characteristic
This designs flow characteristic is up through
the seat ring and out through the cage. The CVS
DBQ and DBAQ series valves are single port,
metal seated valves.
Email:
info@cvs-controls.com
Calgary Sales Office
3516 114 Avenue SE
Calgary, Alberta
T2Z 3V6
Canada
Office: (403) 250-1416
Fax: (403) 291-9487

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DBQ Series and is the answer not in the manual?

Questions and answers

Summary of Contents for CVS Controls DBQ Series

  • Page 1 INSTRUCTION MANUAL CVS Series DBQ and DBAQ Control Valves Introduction Contained in this manual are installation instructions, maintenance and parts information for the CVS DBQ and DBAQ Control Valves. Refer to the appropriate manuals for instructions for the accompanying actuator, positioner and additional accessories.
  • Page 2: Specifications

    SPECIFICATIONS Table 1: Specifications Flanged raised Face ASME Class 1500, or Class 2500 (ASME B16.34-latest edition) (RF) Connection Flanged Ring Type Style ASME Class 1500, or Class 2500 (ASME B16.34-latest edition) Joint (RTJ) Consistent with Class 1500 or Class 2500 per ASME B16.34-latest Maximum Raised Face Flange edition...
  • Page 3: Installation

    Exceeding the recommended pressure and temperature limits from Table 1, or those indicated some adjustment for specific conditions. on the nameplates of your CVS Controls Valve, can result in personal injury and property damage. CVS MAINTENANCE Controls recommends the installation of a relief valve to protect against overpressure situations.
  • Page 4: Packing Lubrication

    PTFE composition. CVS Controls recommends a silicone based lubricant. Lubricant is not recommended for oxygen services or for...
  • Page 5: Adding Packing Rings

    Table 3: Recommended Torque for Packing Flange Nuts Stem Diameter Valve Class Lbf•Ft N•M Inch Rating 1500 12.7 2500 1500 19.1 2500 1500 25.4 2500 1500 1-1/4 31.8 2500 6. Reconnect the body actuator stem connection ADDING PACKING RINGS according to the appropriate manual. Torque accordingly, reference Table 3.
  • Page 6 10b. For all other nuts, CVS Controls 6. Upon removing the bonnet gasket (key 5), recommends that you lubricate the stud cover the opening in the valve body to protect...
  • Page 7 Replacing Packing Continued, 15. Install the packing follower, wiper and packing 17. Mount the actuator on the valve body and flange. Lubricate the packing flange studs (key reconnect the valve plug stems according to 17) and faces of the packing flange nuts (key the appropriate actuator instruction manual.
  • Page 8: Trim Maintenance

    TRIM MAINTENANCE Lapping Metal Seats Disassembly With metal to metal seating in any valve, a 1. Remove the actuator from the bonnet. Refer small amount of leakage can be expected. If to steps 1 thru 5 of Replacing Packing the leakage becomes excessive, it is possible procedure.
  • Page 9: Parts Ordering

    1/4 of When shipped as part of a complete valve the specified nominal torque using proper assembly with a CVS Controls actuator, the same bolting procedures again. Repeat the process valve serial number can be found on the actuator until all nuts are tightened to the specified nametag as well as the valve body.
  • Page 10 Figure 7: 2” CVS SERIES DBAQ Item Description Item Description Body, LCC, 900/1500#, RF Packing Set, Upper Packing, PTFE Bonnet, LCC, 3-9/16 Yoke Boss Packing Set, Center Packing, PTFE Bonnet Flange, LCC Packing Set, Lower Packing, PTFE Pin, Ø.187, 316 SST Packing Flange, Steel Bonnet Gasket Packing Flange Stud, Steel...
  • Page 11 PARTS LISTING – 2“ CVS SERIES DBAQ – Table 5 Item Description Part Number Quantity Body, CVS Series DBAQ, 2”, LCC, 900/1500# RF CVS 2U967522012 Bonnet, LCC, 3-9/16 Yoke Boss, 2” CVS DBAQ CVS 2N1363X0022 Bonnet Flange, LCC, 2” CVS DBAQ CVS 1N339222012 Pin*, Valve Stem/Plug Assembly, (3/4”...
  • Page 12 CVS Series DBQ Dimensions G (Maximum) Class Class 900/1500 Class 2500 Standard Bonnet Ext. Bonnet Class 2500 Nominal 900/1500 Body Size 1/2" 3/4" 1/2" 3/4" Flanged, Flanged, Class Inch Flanged Flanged (12.7mm) (19.1mm) (12.7mm) (19.1mm) Class 2500 or Weld or Weld 900/1500 Ends Ends...
  • Page 13 CVS Series DBAQ – Product Bulletin: Dimensions Class 900/1500 Class 900/1500 Class 2500 Std Bonnet Ext. Bonnet Nominal Body 1/2" 3/4" 1/2" 3/4" Size Inch Flanged, RF, Flanged, RTJ Flange Flanged (12.7mm) (19.1mm) (12.7mm) (19.1mm) or Weld or Weld Ends Ends Ends Stem...
  • Page 14 CVS Series DBAQ: Product Bulletin Flow Coefficients: M-Form Valve Plug Flow Up – Equal Percent Body Port Total Valve Opening – Percentage of Total travel Size Diameter Travel (Inches) .067 .109 .170 .237 .324 .449 .632 .891 1.27 1.62 .121 .163 .271 .443...
  • Page 15 Notes: CVS Controls Ltd. strives for the highest levels of quality and accuracy. The information included in this publication is presented for informational purposes only. CVS Controls Ltd. reserves the right to modify or change, and improve design, process, and specifications without written notice.
  • Page 16 Head Office Calgary Sales Office 3900 101 Street 3516 114 Avenue SE Edmonton, Alberta Calgary, Alberta T6E 0A5 T2Z 3V6 Canada Canada Office: (780) 437-3055 Office: (403) 250-1416 Fax: (780) 436 5461 Fax: (403) 291-9487 Website: www.cvs-controls.com Email: info@cvs-controls.com May 2019...

This manual is also suitable for:

Dbaq series

Table of Contents