9400
Via Circonvallazione, 10
13018 Valduggia (VC), Italy
Tel: +39 0163 47891
Fax: +39 0163 47895
www.vironline.com
DZR Brass Metering Station
valvoindustria ing.Rizzio s.p.a.
Description
DZR brass metering station
Threaded M/F ISO7/1 Rp (F side threaded ISO 228/1 on DN15 and DN20)
Olive and nut kit for European copper tubing (EN1057, F side only) on request:
● DN15, kit for 15mm pipe
● DN20, kit for 22mm pipe
Design according BS7350
Tolerance on nominal Kvs ±3% (test according BS7350)
Gost compliant
PN25 (Max 25bar up to 80°C, max 20bar at 100°C)
Working conditions:
● Water: -10°C to +130°C
below 0°C only for water with added antifreezing fluids
over 100°C only for water with additives avoiding boiling
Part List
N.
1
2
3
4
Part
Material
Norm
4
Body
Venturi insert
Test point
Tie
DZR Brass
DZR Brass
DZR Brass
Polyprop. (blue / red)
EN12164 CW602N
EN12165 CW602N
EN12164 CW602N
-
3
2
1
Dimensions
DN
G1
015ULF ½"
015LF ½"
½"
015
¾"
020
1"
025
1¼"
032
1½"
040
2"
050
H
L
BF
BM
I
(mm) (mm) (mm) (mm) (mm)
57,2
57,2
57,2
60,0
63,5
69,0
72,0
78,0
60,02
60,02
60,02
62,03
67,6
72,4
72,4
82,0
17,5
17,5
17,5
19,0
22,5
24,8
24,8
29,2
15,2
15,2
15,2
16,5
19,1
21,4
21,4
25,7
22
22
22
22
22
22
22
22
Weight
(g)
Flow
(l/s)
2192
2172
2132
2543
353
463
531
755
0,017-0,045
0,031-0,074
0,062-0,1484
0,138-0,3254
0,258-0,6034
0,540-1,2504
0,810-1,8804
1,520-3,5104
H
G
1
ISO7/1 Rp (F side threaded ISO 228/1 on DN15 and DN20)
2
For olive and nut version length 70,7mm, weight +31g
3
For olive and nut version length 73,7mm, weight +37g
4
Suggested flow range applicability (BS7350).
BF
BM
L
If used with measuring manometers different from those proposed by VIR please verify that sensibility of the
measuring device is compatible with indicated minimum flow (see flow measurement paragraph)
I
090610
Drawings, photos and data contained in this card are provided for information only. VIR reserves the right to change them without notice.
090610
Flow Measurement
100,00
DN15ULF, Kvs venturi 0,55
DN15LF, Kvs venturi 1,15
Kvs venturi 2,80
DN15,
Kvs venturi 5,33
DN20,
Kvs venturi 9,72
DN25,
Kvs venturi 20,25
DN32,
Kvs venturi 30,23
DN40,
Kvs venturi 55,07
DN50,
∆p
TP
[kPa]
10,00
1,00
0,10
0,001
0,010
0,100
1,000
Portata [l/s]
Formula linking flow Q (in l/s) and ∆p measured at test points (in
kPa).
Minimum flow that can be measured for each diameter may be
calculated by using in the formula minimum ∆p that can be
measured by used manometer.
Valves are anyway designed for best performances when used
on range previously suggested and as indicated by BS7350.
10,000
100,000
∆pTP
High pressure test point
Low pressure test point
Q=
K vsventuri ⋅ ∆p TP
36
Q (flow)
Headloss calculation
DN
015ULF
015LF
015
020
025
032
040
050
Kv
(m3/h)
Formula linking flow Q
(in l/s) and theoretical
valve headloss ∆p (in
kPa).
0,61
1,23
3,63
7,56
13,61
30,78
48,10
85,51
Q (flow)
∆p
(headloss)
 36 ⋅ Q 

∆p = 
 KV 
2
Installation
To obtain the best performances valve must be installed on a pipe with its same
nominal size preceded and followed by straight pipe lengths as per figure
indications.
Min 5xDN
(10xDN if installed
on pump outlet)
Min 2xDN
Via Circonvallazione, 10
13018 Valduggia (VC), Italy
Tel: +39 0163 47891
Fax: +39 0163 47895
www.vironline.com
Drawings, photos and data contained in this card are provided for information only. VIR reserves the right to change them without notice.