Bray Controls STM Series Installation Instructions Manual

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Bray Controls Commercial Division 13788 West Road, Suite 200A Houston, Texas 77041

[email protected] Phone: 1-888-412-2729 Fax: 1-888-412-2720 www.braycommercialdivision.com

STM Series - Flanged Characterized Ball Valves — Installation Instructions

Applications

The STM Series Flanged Ball Valves are designed to regulate hot and chilled water, 50/50 glycol solutions, and 25 psig steam in Heating, Ventilating, and Air Conditioning (HVAC) systems.

IMPORTANT: The STM Series Flanged Ball Valves are intended to control saturated steam, hot water, and chilled water ﬂow under normal equipment operating conditions. Where failure or malfunction of the valve could lead to personal injury or pro perty damage to the controlled equipment or other property, additional precautions must be designed into the system. Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect against failure or malfunction of the valve.

Installation

Install the STM Series Flanged Ball Valves with the actuator at or above the centerline of the horizontal piping, as shown in Figure 1.

IMPORTANT: In steam applications, install the valve with the stem horizontal to the piping. Failure to follow these guidelines may shorten the life of the actuator.

01/30/19

When mounting the actuator in the ﬁeld and before installing the actuator, use an adjustable wrench to manually rotate the valve stem several times. This rotation breaks the torque that may have built up during longterm storage.

IMPORTANT: Do not attempt to manually rotate the drive shaft while the actuator is installed without ﬁrst releasing the actuator gears. Manually rotating the drive shaft without releasing the actuator gears may result in permanent damage to the actuator.

IMPORTANT: Take care to prevent foreign material such as weld slag, thread burrs, metal chips, and scale from entering the piping system. This debris can damage or severely impede the operation of the valve by embedding itself in the seats, scoring the valve, and ultimately resulting in seat leakage. If the debris becomes embedded in the seats, subsequent ﬂushing and ﬁltering of the piping system with the valve installed does not remedy the problem.

To minimize heat transfer in steam applications, wrap the valve and piping with insulation. Allow at least 4 in. (102 mm) of clearance from the top of the shaft to remove the actuator (as noted in dimensions).

Figure 1: Recommended Mounting Positions for Non-Steam Applications

A AB

B A

A B

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STM Series - Flanged Characterized Ball Valves — Installation Instructions Continued

STM - 2-Way Dimensions

2-Way STM Dimensions

Flow Coefﬁcient

Valve Models

STM 250-2-47

STM 250-2-74

STM 250-2-117

STM 3-2-74

STM 3-2-117

STM 3-2-176

STM 3-2-211

STM 4-2-117

STM 4-2-176

- Allow a minimum of 4 inches for actuator removal.

- Weights are for valve bodies only.

- Dimensions may vary depending on the actuator

- Dimensions Shown are based on largest actuator available for this series.

Size

in.(mm)

2 1/2

(65)

(80)

(100)

Cv Kv

117

176

211

117

176

101.2

152.2

182.5

101.2

152.2

40.7

64.0

Bolt Hole Diameter

5.50 (139)

6.00

(152)

7.50

(191)

Number of

Bolt Holes

A B C D E Weight

3.50 (89)

3.75 (95)

4.50

(114)

5.71

(145)

6.10

(155)

6.89

(175)

11.42 (290)

12.20 (310)

13.77 (350)

10.25 (260)

2.05

(52.1)

2.49

(63.2)

3.09

(75.5)

lbs. kg.

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STM Series - Flanged Characterized Ball Valves — Installation Instructions Continued

STM - 3-Way Dimensions

3-Way STM Dimensions

Size

Valve Models

in.(mm)

STM 250-3-47

STM 250-3-74

2 1/2

STM 250-3-117

STM 3-3-74

STM 3-3-117

STM 3-3-176

STM 3-3-211

STM 4-3-117

STM 4-3-176

- Allow a minimum of 4 inches for actuator removal.

- Weights are for valve bodies only.

- Dimensions may vary depending on the actuator

- Dimensions Shown are based on largest actuator available for this series.

- Bypass Cv/Kv is 50% of the nominal service Cv.

(100)

Flow Coefﬁcient

(65)

(80)

Cv Kv

117

176

211

117

176

101.2

152.2

182.5

101.2

152.2

40.7

64.0

Bolt Hole Diameter

5.50 (139)

6.00

(152)

7.50

(191)

Number of

Bolt Holes

A B C D E F

3.50

5.71

11.42

(89)

3.75 (95)

4.50

(114)

(145)

6.10

(155)

6.89

(175)

(290)

12.20 (310)

13.77 (350)

10.25 (260)

2.05

(52.1)

2.49

(63.2)

3.09

(75.5)

0.75

(19.1)

0.75

(19.1)

0.75

(19.1)

G Weight

lbs. kg.

5.87

6.26

7.05

(149)

(159)

(179)

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STM Series - Flanged Characterized Ball Valves — Installation Instructions Continued

STM - Mounting

Location Considerations

IMPORTANT: Protect the actuator from dripping water, condensation, and other moisture. Water or moisture could result in an electrical short, which may damage or affect the operation of the actuator.

IMPORTANT: Do not cover the actuator with thermal insulating material. High ambient temperatures may damage the actuator, and a hot water pipe, a steam pipe, or other heat source may overheat it.

STM - Piping Diagrams

COIL

Piping

Be sure to wire the input lines to the electric actuator correctly for the valve to move in the proper direction. See piping diagrams below for typical two and threeway piping conﬁgurations.

Note: Mount the valve downstream from the coil to minimize heat transfer to the actuator.

IMPORTANT: Use copper conductors only. Make all wiring connections in accordance with local, national, and regional regulations. Do not exceed the actuator’s electrical ratings.

2-Way

PORT

RETURN

COIL

3-Way

PORT

SUPPLY

PORT

RETURN

SUPPLY

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STM Series - Flanged Characterized Ball Valves — Installation Instructions Continued

STM - Setup and Adjustments

Port A has the ﬂow characterizing disk. Connect Port A to the outlet from the coil. On three-way models, use Port B as the bypass port.

Two-way STM Series Ball Valves are fully open when the electric actuator is fully Counterclockwise (CCW) and fully closed when the electric actuator is fully Clockwise (CW).

For three-way valves, the Coil Port A and Common Port AB are fully open when the electric actuator is fully CCW, as shown in Figure 1. The Bypass Port B and Common Port AB are fully open when the actuator is fully CW, as shown in Figure 2.

FIGURE 1 FIGURE 2

Port A

Coil

Port AB

Common

For non-spring return and spring-to-open proportional control models in the Direct Acting (DA) mode, a minimum control signal drives the electric actuator to the fully CCW position while a maximum control signal drives the electric actuator in the fully CW position.

For spring-to-close proportional control models in the DA mode, a minimum control signal drives the electric actuator to the fully CW position, while a maximum control signal drives the electric actuator to the fully CCW position.

Port A

Coil

Port AB

Common

Port B — Bypass

Figure 1: STM Series Three-Way Ball Valve

(Coil Port A Open to Common Port AB)

Figure 2: STM Series Three-Way Ball Valve

(Bypass Port B Open to Common Port AB)

STM - Troubleshooting

Servicing the Actuator or Piping System

When servicing the electric actuator or the piping system:

• Disconnect the power supply to the actuator.

WARNING: Risk of Electric Shock. Disconnect each of multiple power supplies before making electrical connections. More than one disconnect may be required to completely de-energize equipment. Contact with components carrying hazardous voltage can cause electric shock and may result in severe personal injury or death.

• Relieve the pressure in the piping system

CAUTION: Risk of Property Damage. Do not apply power to the system before checking all wiring connections. Short circuited or improperly connected wires may result in permanent damage to the equipment.

Port B — Bypass