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Trang chủ » Sản phẩm » Hệ thống chữa cháy Sprinkler » Van Tyco và phụ kiện

Van Tyco và phụ kiện

PRV-1 - Van giảm áp

Đăng ngày 16-03-2015 11:25:13 PM - 1298 Lượt xem Mã sản phẩm: PRV-1
Hãng sản xuất: Tyco
Xuất xứ: China
The Tyco®2 thru 8 inch (DN50 thru DN200) Model PRV-1 Pressure Reducing Valves are factory assembled and fully trimmed valve arrangements for pressure control. They are used on water filled pipe where it is necessary to reduce a higher inlet pressure to a lower delivery pressure under static and/or residual flowing conditions. The PRV-1 is intended to automatically maintain the outlet “set pressure” (static and residual) within a close range, regardless of fluctuations in the higher pressure inlet line or varying flow rates.

The PRV-1 is provided with a factory outlet “set pressure” of 125 psi (8,6 bar); however it may be field set to a nominal outlet “set pressure” of 80 to 225 psi (5,5 to 15,5 bar) per its FM Approval or 80 to 150 psi (5,5 to 10,3 bar) per its UL Listing.

Typical applications are as follows:
• Within the main header (Ref. Figure 1) supplying wet pipe, dry pipe, deluge, or preaction system risers, and/or a standpipe system supplying hose connections.
• As part of a sectional floor control assembly (Ref. Figure 2) supplying sprinkler systems, and/or hose stations.
Features are as follows:
• Can be installed in any orientation.
• Eliminates any required bleeding of trapped air from the diaphragm chamber during installation.
• Globe or angle pattern.
• Accurate pressure control.
• Standard nylon coated internal and external One piece, one moving part diaphragm.
• In-line service.
• One pilot valve sub-assembly provides for any outlet “set pressure”, i.e., 80 to 225 psi (5,5 to 15,5 bar).


Approvals:
UL Listed. FM Approved.
The UL Listing is based on
• Installation requirements referenced in the Standard for Installation of Sprinkler Systems, NFPA 13, or the Standard for Installation of Standpipe and Hose Valves, NFPA 14, as applicable.
• Inspection, testing, and maintenance requirements referenced in the Standard for Inspection, Testing, and Maintenance of WaterBased Fire Protection Systems, NFPA 25.
• The Model PRV-1 being field set to provide the required outlet pressures and flows for the given application.
• The Model PRV-1 being tested after installation in accordance with NFPA 13 and/or NFPA 14 as applicable.
• The Model PRV-1 being tested periodically thereafter in accordance with NFPA 25.

Maximum Inlet Pressure: 250 psi (17,2 bar)
Factory Outlet “Set Pressure”: 125 psi (8,6 bar)
Field Outlet “Set Pressure” Range: 80 to 225 psi (5,5 to 15,5 bar) per its FM Approval, or 80 to 150 psi (5,5 to 10,3 bar) per its UL Listing
Pressure Loss With Inlet Pressure Above "Set Pressure"

The inlet pressure minus the outlet "set pressure" equals pressure loss.
For example: assumimg that the inlet flowing pressure is 225 psi (15,5 bar) and the field outlet "set pressure" is 130 psi (9,0 bar), the pressure loss is 95 psi (6,5 bar).
Pressure Loss with Inlet Pressure
Below “Set Pressure”
Refer to Graphs A thru E. (Thesegraphs are a requirement of UL and should be used as reference only.)
Rated Flowing Range: 2inch(DN50):0 to250GPM (0 to 946 LPM) 3inch(DN80):0to550GPM (0 to 2080 LPM) 4 inch (DN100):0to1000GPM (0 to 3785 LPM) 6 inch (DN150):0to2200GPM
(0 to 8325 LPM) 8 inch (DN200):0to4000GPM (0 to 15140 LPM)

End Connections:
Threaded end connections are available NPT threaded or threaded per ISO 7/1. Flanged end connections are available drilled per Table A. Grooved end connections are per industry standard groove specifications. Construction (Ref. Figure 3):

Body.Rilsan* blue coated ductile iron per ASTM A536-77, Grade 65-45-12.
Handhole Cover. Rilsan* blue coated ductile iron per ASTM A536-77, Grade 65-45-12.
Diaphragm. Nylon fabric reinforced, natural rubber per ASTM D2000.
Diaphragm Cover Fasteners.Galvanized carbon steel.
Pilot Valve.Brass and stainless steel with nylon fabric reinforced, natural rubber per ASTM D2000 diaphragm.
Strainer. Brass and stainless steel.
Pressure Gauges.2-1/2 inch (65 mm) diameter, stainless steel case, 0to350psi(25bar).
Tube, Fittings, and Needle Valve.
Copper, brass, and stainless steel.
*Rilsan is a registered trademark of
ATOFINA Chemicals, Inc. (The Rilsan coating is a polyamide (Nylon 11) coating.)



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