Boiler house
Local regulations may restrict the use of this product to below the conditions quoted.
In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2017
Blowdown vessels
TI-P405-47
EMM Issue 2
KBV21i and KBV40i
Key Operated Boiler Blowdown Valves
Description
The key operated boiler blowdown valve consists of a carbon steel reduced bore ball valve with carbon reinforced PTFE seats and a
key operated mechanism in stainless steel. Two types of key are sold as optional extras and are available as follows:
- Standard length key
.
- Extended length 'T' bar type key
for use where access to the valve is limited.
To ensure compliance with boiler regulations the key cannot be removed when the valve is open.
Note: The standard length key and extended length 'T' bar type key are sold separately. It is recommended that an extended length 'T'
bar type key is purchased for valve sizes DN50 and DN65.
Standards
These products comply with the requirements of the European Pressure Equipment Directive 2014/68/EU and carries the
mark
when so required.
ISO mounting in accordance with ISO 5211.
Antistatic device complying with ISO 7121 and BS 5351.
Certification
These products are available with certififcation to EN 10204 3.1.
Note: All certification / inspection requirements must be stated at the time of
order placement.
Sizes and pipe connections
DN25, DN32, DN40, DN50 and DN65
Flanged PN40 (F4), PN40 (BS) or ASME (ANSI) B 16.5 Class 300.
Available flange options:
Flange
PN40 (F4)
PN40 (BS)
ASME (ANSI) 300
Materials
Body and insert
Stem seals
Vented ball
DN65
DN25 - DN50
Face-to-face
DIN 3002 F4
BS 2080
ASME B 16.10
Zinc plated carbon steel
Antistatic R-PTFE
Austenitic stainless steel
Austenitic stainless steel
Martensitic stainless steel
Stem
Flange thickness
EN 1092 Part 1
EN 1092 Part 1
ASME B 16.5
ASTM A216 WCB
AISI 316
AISI 316
AISI 420
PDR 0.8
Seats
Carbon and graphite reinforced PTFE
Page 1 of 5
2.9.12
