Typical Requirements for Control Valves used in Integrated Automation System

The following addresses requirements for typical control valves. Modify as required to match project design, clearly delineate responsibilities between controls contractor and mechanical contractor, delete valve sections that are not relative to the scope of this project.

Typical Requirements for Control Valves used in Integrated Automation System

    1. General:

      1. Provide factory fabricated control valves of type, body material and pressure class indicated.
      2. Where type or body material is not indicated, provide selection as determined by manufacturer for installation requirements and pressure class, based on maximum pressure and temperature in piping system.
      3. Provide valve size in accordance with scheduled or specified maximum pressure drop across control valve.
      4. Control valves shall be equipped with heavy-duty actuators, and with proper close-off rating for each individual application.
      5. Minimum close-off rating shall be as scheduled and adequate for each application, and shall generally be considered at dead head rating of the pump.
      6. <State Contractor responsible for valve installation>

    2. Plug-Type Globe Pattern for Water Service:

      1. Valve Sizing: Where not specifically indicated in the Contract Documents, modulating valves shall be sized for maximum full flow pressure drop between 50 percent and 100 percent of the branch circuit it is controlling unless scheduled otherwise.  Two-position valves shall be same size as connecting piping.
      2. Single Seated (Two-way) Valves: Valves shall have equal-percentage characteristic for typical heat exchanger service and linear characteristic for building loop connections to campus systems unless otherwise scheduled on the drawings.  Valves shall have cage-type trim, providing seating and guiding surfaces for plug on ‘top-and-bottom’ guided plugs.
      3. Double Seated (Three-way) Valves: Valves shall have linear characteristics. Valves shall be balanced-plug type, with cage-type trim providing seating and guiding surfaces on ‘top-and-bottom’ guided plugs.
      4. Temperature Rating: 25 degrees F minimum, 250 degrees F maximum
      5. Body: Bronze, screwed, 250 psi maximum working pressure for ½ inch to 2 inch; Cast iron, flanged, 125 psi maximum working pressure for 2-1/2 inches and larger.
      6. Valve Trim: Bronze; Stem:  Polished stainless steel
      7. Packing: Spring Loaded Teflon or Synthetic Elastomer U-cups, self-adjusting
      8. Plug: Brass, bronze or stainless steel, Seat: Brass
      9. Disc: Replaceable composition or stainless steel filled PTFE
      10. Ambient Operating Temperature Limits: -10 to 150 degrees F (-12.2 to 66 degrees C)
      11. Acceptable Manufacturers: Subject to compliance with requirements, approved manufacturers are as follows: <Confirm list>
        • Honeywell
        • Johnson Controls
        • Warren
        • FlowCon
        • Approved equal

    3. Plug-Type Globe Pattern for Steam Service:

        1. Valve Sizing: Where valve size is not specifically indicated in the Contract Documents, size modulating valves for applications of 15 psig or less for 80 percent of inlet gauge pressure unless scheduled otherwise. Modulating valves for applications of greater than 15 psig shall be sized for 42 percent of inlet absolute pressure unless scheduled otherwise.  Two-position valves shall be same size as connecting piping.
        2. Characteristics: Modified equal-percentage characteristics.  Cage-type trim, providing seating and guiding surfaces for plug on “top and bottom” guided plugs.
          1. Working Temperature: 250 degrees F minimum for saturated steam applications of 15 psig or less; 366 degrees F minimum for saturated steam applications of greater than 15 psig up to 150 psig.
        3. Body: Bronze, screwed, 250 psig steam working pressure for ½ inch to 2 inch; Cast iron, flanged, 100 psig steam working pressure for 2-1/2 inches and larger for applications of 50 psig or less.
        4. Valve Trim, Plug, Seat and Stem: Polished stainless steel
        5. Packing: Spring Loaded Teflon
        6. Disc: Replaceable composition or stainless steel filled PTFE
        7. Acceptable Manufacturers: Subject to compliance with requirements, approved manufacturers are as follows: <Confirm list>
          • Honeywell
          • Johnson controls
          • Warren
          • FlowCon
          • Approved equal

    4. Butterfly Type: To be used for two-position control only, unless prior approval is obtained from Owner.

        1. Body: Extended neck epoxy coated cast or ductile iron with full lug pattern, ANSI Class 125 or 250 bolt pattern to match specified flanges
        2. Seat: EPDM, except in loop bypass applications where seat shall be metal to metal
        3. Disc: Bronze or stainless steel, pinned or mechanically locked to shaft
        4. Bearings: Bronze or stainless steel
        5. Shaft: 416 stainless steel
        6. Cold Service Pressure: 175 psi
        7. Close Off: Bubble-tight shutoff to 150 psi
        8. Operation: Valve and actuator operation shall be smooth both seating and unseating. Should more that 2 psi deadband be required to seat/unseat the valve, valve shall be replaced at no cost to the Owner.
        9. Acceptable Manufacturers: Subject to compliance with requirements, approved manufacturers are as follows: <Confirm list>
          • Honeywell
          • Keystone
          • Bray Series 31
          • Dezurik BGS
          • Approved equal

    5. Ball Type:

      1. Body: Brass or bronze; one-, two-, or three-piece design; threaded ends
      2. Seat: Reinforced Teflon
      3. Ball: Stainless steel
      4. Port: Standard or ‘V’ style
      5. Stem: Stainless steel, blow-out proof design, extended to match thickness of insulation
      6. Cold Service Pressure: 600 psi WOG
      7. Steam working Pressure: 150 psi
      8. Acceptable Manufacturers: Subject to compliance with requirements, approved manufacturers are as follows: <Confirm list>
        • Honeywell
        • Conbraco
        • FlowCon
        • Griswold
        • Approved equal

    6. Segmented or Characterized Ball Type:

      1. Body: Carbon steel (ASTM 216), one-piece design with wafer style ends
      2. Seat: Reinforced Teflon (PTFE)
      3. Ball: Stainless steel AST****M A351
      4. Port: Segmented design with equal-percentage characteristic
      5. Stem: Stainless steel
      6. Cold Service Pressure: 200 psi WOG
      7. Valve stem assembly shall be of a pack-less design and be field-replaceable without removing the valve body from the piping. Teflon® seals shall hold the stem in alignment, and protect the O-ring from system temperature fluctuations. Stem O-ring shall be made of peroxide-cured EPDM and be isolated from system treatment chemicals by a reservoir of silicon grease. Valve shall have a blow-out proof stem with minimum 600 psi rating.
      8. 50mm (2”) dia and smaller: forged brass body rated at no less than 2,758 kPa (400 psi), chrome plated brass ball and stem, female NPT union ends, dual EPDM lubricated O-rings and a characterizing insert, factory pressed into the ball..
      9. Acceptable Manufacturers: Subject to compliance with requirements, approved manufacturers are as follows: <Confirm list>
        • Honeywell
        • Griswold
        • FlowCon
        • Approved equal
        • Pressure Independent Control Valves
      • Valve stem assembly shall be of a pack-less design and be field-replaceable without removing the valve body from the piping. Teflon® seals shall hold the stem in alignment, and protect the O-ring from system temperature fluctuations. Stem O-ring shall be made of peroxide-cured EPDM and be isolated from system treatment chemicals by a reservoir of silicon grease. Valve shall have a blow-out proof stem with minimum 600 psi rating.
      • Balancing valves and associated balancing shall not be required wherever a pressure independent control valve is installed. Flow performance curves and verification of minimum ∆P across the valve shall be provided with each valve.
      • Valve regulator cartridges shall be accessible and field serviceable. Valve stems shall be removable and valve packing shall be field-replaceable.
      • 50mm (2”) dia and smaller: forged brass body rated at no less than 2,758 kPa (400 psi), chrome plated brass ball and stem, female NPT union ends, dual EPDM lubricated O-rings and a characterizing insert, factory pressed into the ball.
      • Acceptable Manufacturers: Subject to compliance with requirements, approved manufacturers are as follows: <Confirm list>
        • Honeywell
        • Griswold
        • FlowCon
        • Approved equal

Pressure Independent Control Valves

  • Valve stem assembly shall be of a pack-less design and be field-replaceable without removing the valve body from the piping. Teflon® seals shall hold the stem in alignment, and protect the O-ring from system temperature fluctuations. Stem O-ring shall be made of peroxide-cured EPDM and be isolated from system treatment chemicals by a reservoir of silicon grease. Valve shall have a blow-out proof stem with minimum 600 psi rating.
  • Balancing valves and associated balancing shall not be required wherever a pressure independent control valve is installed. Flow performance curves and verification of minimum ∆P across the valve shall be provided with each valve.
  • Balancing valves and associated balancing shall not be required wherever a pressure independent control valve is installed. Flow performance curves and verification of minimum ∆P across the valve shall be provided with each valve.
  • 50mm (2”) dia and smaller: forged brass body rated at no less than 2,758 kPa (400 psi), chrome plated brass ball and stem, female NPT union ends, dual EPDM lubricated O-rings and a characterizing insert, factory pressed into the ball.
  • Acceptable Manufacturers: Subject to compliance with requirements, approved manufacturers are as follows: <Confirm list>
    • Honeywell
    • Griswold
    • FlowCon
    • Approved equal

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