Section 15115 HOT WATER MIXING VALVES

Section 15115

HOT WATER MIXING VALVES

PART 1 – GENERAL

1.1 THE REQUIREMENT

A. The Contractor shall provide hot water mixing valves, complete with actuator, supports, spare parts, electrical work and all other appurtenances in accordance with the Contract Documents.

B. Hot water mixing valves furnished under this Section shall be specifically designed for use in hydronic applications with hot water temperatures up to 250 degrees F.

1.2 REFERENCE SPECIFICATIONS, CODES AND STANDARDS

A. The work of the following sections applies to the work of this Section. Other sections of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this work:

1. General Conditions

2. Section 01660, Installation, Testing, Commissioning and Training

3. Section 15100, Valves, General

4. Section 17300, Instrumentation and Control – Control Descriptions

1.3 SUBMITTALS

A. In addition to the requirements of Section 15100 and the material listed in the detailed specification, the following shall be submitted in accordance with Section 01300:

1. Complete assembly and installation drawings showing dimensional layout, materials of construction, applicable material standards, equipment details and appurtenances.

2. Manufacturer literature and catalog cut sheets.

3. Manufacturer’s installation instructions.

4. Manufacturer’s O&M manuals as specified in Section 01300.

PART 2 – PRODUCTS

2.1 VALVE

A. Valves shall be three-port double-seated type with ductile (SG) iron body. Valve shall provide linear flow characteristic with parabolic vee-port plug design. Valve plug, stem, and seat shall be of stainless steel.

B. Shut-off tightness shall be ANSI/FCI class IV or better. Valve rangeability shall be 30:1 or better. Stem seal shall be PTFE chevron type. Valve connections shall be ANSI 125 flanges and sized as indicated on Contract Drawings.

2.2 ACTUATORS

A. Actuators shall be electric, reversible, and have linear output. Supply voltage to be 24

VDC.

B. Actuator shall be provided with 4 – 20 mA input signal for valve control and a 4 – 20 mA

output signal for valve position feedback. Enclosure shall be NEMA 4X stainless steel. C. Actuator to be equipped with a handwheel for manual override.

2.3 MANUFACTURERS

A. Hot water mixing valves shall be manufactured by one of the following or equal:

1. Emerson – Fisher Control Valve Model YS with Electric Actuator

2. Or Approved Equal

PART 3 – EXECUTION

3.1 INSTALLATION

A. Installation shall be in accordance with the manufacturer’s instructions and Section

15100.

END OF SECTION