Danfoss AB‑QM Data sheet

Data sheet

Pressure Independent Control Valve AB‑QM,

½” thru 2” 2½” thru 4” 5” thru 10” Valve Size

Features and Benefits

The AB-QM temperature control valve provides pressure independent regulation of flow while also providing flow limiting system balance. The valve internally contains a unique differential pressure regulator which automatically adjusts to normal changes in system pressure from valves opening and closing or changing of pump speed. As a result of maintaining a constant pressure for the temperature control valve, valve authority is maintained at 100%. This allows for precise interaction with the temperature controller and unparalleled system operation as indicated by assuring the highest possible coil log mean temperature difference (∆T). The valve is easily set and adjusted to provide the precise flow required for each terminal unit. Design calculation and commissioning effort normally required for it's control and balance valves are virtually eliminated because of the built in automatic pressure control regulator. A wide selection of actuators are available for the AB-QM providing further control features for the valve, making it an ideal selection for the simplest of two position control strategies to the precision required for modulating control and variable speed pump optimization.

Features:

• AB-QM maintains a stable flow through its range of operation unaffected by changes in system differential pressure period. 100% valve authority allows lower pump head than traditional valves and reduces energy consumption which increases ∆T

• Three required valve functions; temperature control, balance and flow limitation in one compact valve design

• Flow parameter is the only consideration,

reducing valve selection engineering

• Constant flow regulation limitation through independent pressure balancing

• User adjustable flow setting for maximum flow limitation

• Maintains linear characteristic of flow when installed with a Danfoss proportional actuator. Actuator options with equal percentage flow characteristics.

Benefits:

• Flow will match the load

• Eliminate coil over flows

• Reduced installation time and materials

• Simple flow setting procedure; reduced time involved for field commissioning

• Valve allows maximum coil and system differential temperature drops for optimum efficiency

• Operation costs reduced as much as 90 % or more when properly applied with variable speed pumping

• "Plug and Play" for quick setup for balancing allowing immediate start up of unit

• Commissioning accomplished without use of specialized equipment

• Compact design allows installations in areas with limited space such as stand alone fan coils

Data sheet Pressure Independent Control Valve AB‑QM, ½” thru 2” 2½” thru 4” 5” thru 10” Valve Size

Technical Data:

Nominal Diameter ½” LF ½” HF ¾” HF 1” HF 1¼” H F 1½” 2”

Max flow (GPM) 1.2 5 7.5 12 17.5 33 55

Setting range

Diff. pressure (PSI)

2), 3)

2.3-60 5-60 4.4-60

20 -100 % 40 -100 %

Connection Male NPSM

Control valve characteristic

Control valve accuracy

Linear

± 5% of set point

Max. differential pressure

90 psi (6.2 bar)

(across the valve)

Max. close off pressure (regardless

232 psi (16 bar) 250 psi (17.2 bar)

of actuator)

Medium temperature

15 °F to 250 °F (−10 °C to 120 °C)

Allowable Fluid Water and secondary refrigerant additives such as glycol

Leakage Class 4, metal to metal

Nominal Diameter 2 ½” 3” 4” 5" 6” 8” 10" 2 ½” HF 3” HF 4” HF 5" HF 6" H F 8" HF 10" H F

Max flow (GPM) 85 120 165 395 640 830 1,235 110 176 260 485 830 1,100 1,60 0

Setting range

Diff. pressure (PSI)

Connection ANSI Flange (ANSI Standard B16.1)

2), 3)

4.4-60 8.7– 60

ISO Flange &

Gasket (ISO

Flange EN

1092-2)

40 -100 %

ANSI Flange (ANSI Standard B16.1)

ISO Flange &

Gasket (ISO

Flange EN

1092-2)

Connection rating ANSI Class 125

Control valve characteristic

Control valve accuracy

Linear

± 5% of set point

Max. differential pressure

90 psi (6.2 bar)

(across the valve)

Max. close off pressure (regardless

232 psi (16 bar)

of actuator)

Medium temperature

15 °F to 250 °F (−10 °C to 120 °C)

Allowable Fluid Water and secondary refrigerant additives such as glycol

Leakage Class 4, metal to metal

Factory se tting of the valve is done at 100%.

Regardless of t he flow limitations valve can mo dulate till 0.1% of the nomina l flow.

∆p = (P1–P3) min~max

According suitabili ty and usage especiall y in not oxygen tight syste ms please mind the instructio ns given by the coolant produce r. Available AB- QM valves with low minimum p in sizes ⁄” to 1⁄”. Contact Danfoss f or further informati on.

2 | AI194086469170en-US0401 © Danfoss | 2022.03

Data sheet Pressure Independent Control Valve AB‑QM, ½” thru 2” 2½” thru 4” 5” thru 10” Valve Size

Ordering Information:

Code No. Size Max. Flow (GPM)

003Z1321 ½“ LF 1.2

003Z1332 ½“ HF 5

003Z1333 ¾“ HF 7.5

00 3Z1334 1“ HF 12

00 3Z1335 1 ¼“ HF 17. 5

AB-QM (⁄" - 1⁄") Without P/T Plug s

Contact Danfoss f or lower p valve bodies i n sizes from ⁄" to 1 ⁄”

AB- QM (2⁄"-4")

With P/T Plugs

AB -QM (1⁄"-2 ") With P/T Plugs

AB- QM (5"- 6") With P/T Plugs

003Z0780 1 ½“ 33.0

003Z0781 2" 55.0

Code No. Size Max. Flow (GPM)

003Z0783 2½" 85

003Z0784 3" 120

003Z0785 4" 165

003Z0905 5" 395

003Z0906 6" 640

003Z0707 8" 830

003Z0708 10" 1235

003Z0983 2½” H F 11 0

003Z0984 3" HF 176

003Z0985 4" HF 260

003Z0 915 5" HF 485

003 Z0916 6" HF 830

00 3Z07 17 8" HF 110 0

003 Z0718 10" H F 1600

Accessories

Code No. Description

003Z0695 Brass handle for AB- QM 1½" thru 4", required if without assembled motor ac tuator

003Z0696 Brass handle for AB- QM 5" thru 6", required if without assembled motor actuator

003Z0697 Brass handle for AB -QM 8" thru 10", required if without assembled motor actuator

003Z0230 Brass shut-off & protection cap, Max 232psi (16 bar) (for use with ½” to 1¼” AB-QM valve)

003Z0236

Note: For insulation k its contact Danfoss

Locking Ring - installed to inhibit the unintentional changing of the AB- QM valve setting, 5pcs. (for use with ½" to 1¼" AB-QM valve)

MNPT THREADED TAILPIECE KIT (two kits required per valve)

Code No. Size Connection Type Description

003Z0282 ½”

003Z0283 ¾”

003Z0284 1"

003Z0285 1¼"

003Z0286 1½"

003Z0287 2"

NPT (Male)

One Nut + One Tailpiece +

SWEAT TAILPIECE KIT (two kits required per valve)

Code No. Size Connection Type Description

003Z0292 ½”

003Z0293 ¾”

003Z0294 1"

003Z0295 1¼"

003Z0296 1½"

003Z0297 2"

Sweat (Female)

One Nut + One Tailpiece +

ISO FLANGES & GASKETS, for 8” & 10” VALVES (2pcs per valve)

Code No. Size Connection Type Description

D2576-16-200 8” ISO PN 16 ISO flat face slip on weld f lange, EN 1092-2

GASKET AB-QM 8 ” 8” Gasket 8" gasket for ISO flange

D2576-16-250 10" ISO PN 16 ISO flat face slip on weld flange, EN 1092-2

GASKET AB-QM 10" 10 " Gasket 10" gasket for ISO flange

One Gasket

AI194086469170en-US0401 | 3© Danfoss | 2022.03

Data sheet Pressure Independent Control Valve AB‑QM, ½” thru 2” 2½” thru 4” 5” thru 10” Valve Size

Electric Actuator

Selection Information:

Refer to electric actuator data sheet for further information.

For Valve Sizes ½" to 1¼"

Style Note Code No. Power

08 2F1150

ABN A5

AMI 120 NL-1

08 2F1151 • •

082F1154 • • •

08 2F1156

08 2F1157 • •

082H5003 24Vac • •

24Vac

120 Vac

AMV 120 NL-1 082H5005 24Vac • •

AME 13 SU-1

AME 13 SD-1

ABNM A5 (Equal Percentage)

ABNM A5 (Linear)

082H5006 24Vac • • • •

082H5007 24Vac • • • •

08 2F1163 24Vac • •

08 2F116 0 24Vac • •

08 2F116 5 24Vac • •

08 2F1161 24Vac • •

AME 120 NLX-1 082H5004 24Vac • •

Included required 003Z3960 adap ter

Included req uired spacer 003Z02 57

Require cable o rdered as separate Code no.

Input Signal

On/Off

Floating

Modulating

Feedback

• •

For Valve Sizes 1½" to 4"

Style Code No. Power

On/Off Floating Modulating Up Down

AME435 QM 08 2H017 1

AMV 435 082H0162 • •

AME 25SU

AME 25SD

Adapter requi red, ordered separately. Part # 0 03Z0694

082H3041 • • • •

082H3038 • • • •

24Vac

Input Signal

• •

Position

Feedback

Position

Safety Function

Up Down

For Valve Sizes 5" to 6"

Style Code No. Power

On/Off Floating Modulating Up Down

AM E 655-1 082H 5010

AME 658 SD-1 08 2H 5011 • • • •

24Vac

Input Signal

• • •

Position

Feedback

AME 658 SU-1 08 2H5012 • • • •

Safety Function

For Valve Sizes 8” to 10”

Style Co de No. Power

On/Oﬀ Floating Modulating

Input Signal

AM E 685 -1 0 82H5 013 24Vac • • •

Digital actu ators available, refer to N ovocon series data sheet for ABQM va lves for further inform ation.

Position

Feedback

Function

Safety

Data sheet Pressure Independent Control Valve AB‑QM, ½” thru 2” 2½” thru 4” 5” thru 10” Valve Size

Application:

The AB-QM is a versatile device that can be used as an actuated or non-actuated balance valve / flow limiter. With an actuator mounted to the AB-QM valve, the assembly is a pressure independent control valve. Utilizing a proportioning controller, the AB-QM creates a robust and stable energy management sub system using only the required flow and energy to offset facility heat transfer gains and losses.

The integrated AB-QM differential pressure regulator virtually eliminates the problem of fluctuating pressures on control valve performance. The AB-QM regulator immediately reacts to all changes in system pressure creating the stability to make the valve flow and control predictable and controllers and valves work as intended. Energy is saved taking advantage of the greatly reduced amount of flow required for heat transfer of full valve authority for an air handling unit (AHU), fan coil, etc. With the AB-QM the required design flow to the AHU is met, subsequently simplifying the balancing of the system. Air handling units react quickly to changes in the building load and simple proportional control will not accurately regulate these systems. Using control integral action to adjust for this requires skill and extra commissioning to properly match the required

setting to the applications, sometimes over several seasons of operation. The AB-QM differential pressure regulator acts as an extra sub-master controller and makes tuning the main controllers easier and less time consuming. Smaller building HVAC sub-systems such as fan coil units, or terminal unit heating coils and newer modern designs such as chilled beams or radiant cooling panels greatly benefit from AB-QM application even when applied with simple thermostatic operation. No pressure calculations are required, valve authority doesn't need to be calculated and no calculations have to be performed to pre-set a balancing valve. If extra flow is determined to be required while tuning the installation, it's easy for the commissioning agent to reset the AB-QM for any flow up to the rated range of the valve. The HVAC units and controllers will benefit from greatly enhanced ability to control, with no overflow. AB-QM allows hydronic HVAC systems to achieve the green and sustainable performance envisioned by their designers and owners. Owners benefit in significant reductions in commissioning time, energy cost in operation from reduced flow and reduced complaints associated with improper temperatures within the building.

Minimum Pressure Drop

To verify that an installation functions according to the design specifications checking the critical valve in the installation is needed . The critical valve is the furthest valve away on the branch or loop and has the lowest available differential pressure. The AB-QM maintains a constant differential pressure across temperature control

valve and any excess pressure will automatically be throttled by the regulator. If there is not enough differential pressure the valve cannot reach the set flow. Therefore the critical valve must have the minimum differential pressure for the pressure regulator to properly operate, all prior AB-QM valves will function properly.

Data sheet Pressure Independent Control Valve AB‑QM, ½” thru 2” 2½” thru 4” 5” thru 10” Valve Size

Function

Differential Pressure Regulator

The AB-QM combines aspects of both a differential pressure controller for balancing and a temperature control into a single valve.

P1 Available Pressure P2 Regulated inlet pressure to temperature

control valve P3 Exit pressure of valve

Flow enters the valve through the differential pressure regulator, which maintains a constant pressure difference across the temperature control valve orifice. As entering pressure increases or decreases in reaction to changes in flow and pump speed in the piping system, the regulator diaphragm is balanced with the force of the spring keeping a constant pressure difference (P2-P3) between the water entering the temperature control valve and the leaving side of the valve. As a result the differential pressure across the temperature control valve (P2-P3) is at a constant level.

A nominal 5 psi differential is required from P1 to P3 for the valve and flow regulator operation. The regulator controls the range of system differential pressure to 60 psi (140 FOH). Under normal system operation such as in variable speed pumping, as system flow is reduced, controlled pump speed reduces the system differential pressure (head) of the pump. In constant speed pumping applications reductions in system flow may result in increased system differential pressure (head) of the pump.

Valve Operation / Design

AB-QM ⁄" - 1⁄ "

1. Stuffing box

2. Spindle

3. Plastic ring

4. Control valve plug

5. Diaphragm

6. Regulator spring

7. Regulator cone

8. Regulator seat

AB-QM 1⁄" - 2 "

1. Shut off screw

2. Main spring

3. Membrane

4. DP cone

5. Seat

6. Valve body

7. Control valves cone

8. Locking screw

9. Scale

10. Stuffing box

11. Spindle

AB-QM ⁄"- 1⁄"

AB-QM 1½"- 2"

+ 12 hidden pages