valv purga tecval - A.T.C. Tecnoval S.A.Boiler blowdown valve use is regulated by ASME Code for Power Piping B31.1 - 2004 (most current version). The following excerpts are provided

Series VP Blowdown Valves

Construction Materials

Operation

Table 4

VP250-QO

VP250F -QO

VP300-QO

VP300F -QO

VP250-SO

VP250F -SO

VP300-SO

VP300F -SO

Slo

w

Op

enin

g

Qu

ick

Op

en

ing

Maximum Operating Pressures

When operated, the disc slides across the outlet body seat, pushing harmful boiler scale away

Applications acording to CRN, the Maximum allowed working pressure is 100 PSI.

, wiping clean

the precision lapped surface.

Table 2

Pressure Ratings

Straight-through !ow .

Line pressure and heavy conical spring hold the disc "rmly against the body seat, sealing o# the !ow .

Class 300

ASME / ANSI Requirements for Boiler Blowdown

Fig. 1 or 3

Fig. 2

Fig. 3

Section C

Series VP Blowdown Valves

Series VP Blowdown Valves

Dimensions

Typical Installation

L

Guidelines

Series VP Blowdown Valves

Ordering Code

Spare Parts Ordering Codes

250

300T

FQO

SO

S p a r e P a r ts S e ts

100

150

125

200

250