Brochure

255F-27855-10
Guide Specification Text
F-27990-4 tc 13
© 2019 Schneider Electric. All rights reserved. All trademarks are owned by Schneider Electric Industries SAS or its
affiliated companies.
e. Sizing: Modulating Water: Minimum 5 psi or at least equal to the load
pressure drop.
7. Valves 3-Way diverting (one inlet and two outlets) NPS 2” and Smaller:
a. Operator, stem and plug assembly, and spring-loaded PTFE/EPDM valve
stem packing cartridge must be removable for future replacement to
restore the valves back to their original condition. Valves must be designed
specifically for diverting service, and mixing valves designed for mixing
service must not be used for diverting applications. Material grade
properties must meet the fluid temperature and pressure requirements:
1 Standard duty bronze body, 316 stainless steel vertical stem, brass
plug, and bronze seat, renewable disc and packing cartridge, and
screwed ends. Valves shall have allowable media temperature of
20°F …281°F to assure reliability with dual temperature applications.
8. 3-Way diverting hydronic system globe valves shall have the following
characteristics:
a. Rangeability: Greater than 100:1 for all valves to provide stable control
under light load conditions.
b. Maximum Allowable Seat Leakage: ANSI Class III seat leakage (maximum
0.1% of full open valve capacity).
c. Maximum Allowable Pressure Differential: 35 psi in.an open position.
d. Flow Characteristics: Modified linear characteristics with gradual opening
for light loads.
e. Sizing:
1 a. Modulating Water: Minimum 5 psi or at least equal to the load
pressure drop.
9. Required Certifications:
a. Pressure Equipment Directive (PED 97/23/EC), RoHS (Restriction of
Hazardous Substances) and REACH (Regulation, Evaluation,
Authorization, and Restriction of Chemicals), Canadian Registration
Number.
10. Valve and Operator:
a. To assure maximum performance and operation of the valve assembly
both the valve and the actuator must be tested and approved by the valve
manufacturer to assure compatibility of all components and performance to
the specifications.
C. 2”…6” Cast Iron Flanged Valves
[Schneider Electric VB-8000 and VB-9000 valves]
1. Bodies
a. Shall be American Factory fabricated with ASTM A 126 Class B cast iron
body material with the pressure class within the maximum pressure and
temperature rating of the piping system. (125 body rating with not less than
200 psig at 150°F, decreasing to 169 psig at 281F per ANSA B16.1)
2. Manufacturer
a. Shall have at least 25 years of valve manufacturing and meet the
provisions of Section 1605 of the American Recovery and Reinvestment
Act, buy American, requirements. All valves shall be water tested by
manufacturer prior to shipment.
Guide Specification Text
Pg. 13