Specifications

Fire Protection Butterfly Valve, A type Fire Protection Butterfly Valve, LT type Fire Protection Butterfly Valves

LPB11-2 fire protection butterfly Valve has unique shape, compact structure, high-strength disc using frame structure. It has bidirectional sealing function for installation without the interference of the medium flow direction. The surface is coated with epoxy resin, which could prevent rust effectively, a wide choice of seat material can be used in different medium, such as water, oil…

Design Feature

1. Optional multi-pressure stage
2. Special design will not cause death card
3. Torque and lighter, easy to replace the seat
4. Unique shape
5. Frame structure
6. Coated disc

Parameter

Design standard:

Valve body is designed to meet ISO 5752.

       Upper flange standard:

              24” and below, valve mounting flange and stem shall be per ISO 5211.

              28” and above, valve mounting flange shall be per ISO5211, stem shall be round keyed.

       Flange standard:

              LPB11: ASNI 150 B16.5, JIS B2211, GB 9113.1

              All wafers have locating holes for ease of installation.

       Pressure rating:

              Bi-directional bubble-tight shut off to:     16 bar (230PSI) – DN40~DN600mm

                                                                      10 bar (150PSI) – DN650~DN1200mm

              And tested to 110% of full rating:     18 bar (260PSI) – DN40~DN600mm

                                                               11 bar (160PSI) – DN650~DN1200mm

       Shell testing:

              The body strength can stand 150% of full rating: 24 bar (340PSI) – DN40~DN600mm

                                                                                    15 bar (220PSI) – DN650~DN1200mm

       Installation instruction:

       The valve is designed for using between all types of flat or raised face flange, do not use flange gaskets. For proper installation, the space between flanges must be sufficient to permit valve insertion without disturbing the rubber liner flange seal. Rotate the stem to position the disc within the body, place the valve between flanges and hand-tighten the bolts. Slowly open the valve counter clockwise to check for adequate disc clearance. Rotate the disc to 10% open position and cross tighten all bolts again check for adequate disc clearance.

Stem retaining mechanism:

       The stem is retained in the body through a special Q type design when the size is under DN350mm, so the stem can be removed from the body and disc without any special tools. Only when being disassembled, the valve disc can be positioned around 135º.

       Others:

       According to customer requirements.