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平衡-流量測量裝置

流量測量裝置與平衡閥配對，在專用接頭處讀取迴路流量——當調節閥自身無固定孔口時作為獨立測點，或空間緊張時作為測量與調節合一閥。產品範圍涵蓋 DZR 銅合金 PN25 系列 DN15 至 DN50（含僅 DN15 的超小流量變體）、不鏽鋼 PN25 系列 DN20 至 DN600，以及 DN50 至 DN400、PN16 的測量調節合一閥，錐形螺紋端依 BS EN 10226-2（ISO 7-1）。測量採直角入口孔板並帶取壓口，供 P84 插入式測試點使用，精度 ±5%：流量依 Q = Kvs × √ΔP / 36 跨固定孔口計算，於兩個測試點讀取。D901 適合按 100 至 400 Pa/m 管摩擦損失設計的系統，僅 DN15 的 D902 測量 0.015 至 0.06 L/s 的超小流量（如風機盤管迴路）；D901/D902 資料引用 6.1 Kv 與 4.7 Kvs，螺紋端額定 -10 至 +100 °C / 25 bar（120 °C 時降額至 21.8 bar），依 BS 7350 獲 WRAS 批准至 99 °C。DM950 在一段短管上將雙調節蝶閥與固定孔口測量裝置組合——經典調試套組。為何要平衡：在未平衡的管網中，過多的水流經阻力最小的迴路（通常最靠近泵），阻力大的迴路則水量不足，平衡裝置可適應變流量系統中的壓力變化。

屬於平衡閥系列

最後更新： 2026-10

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系列規格

Nominal valve connection size	DN15-DN50 (D901/D902), DN20-DN600 (DM900), DN50-DN400 (DM950G)
Pressure class / nominal rating designation	PN25, PN16
Valve body material	DZR Copper Alloy, Stainless Steel
dzr line	D901 DN15 to DN50 Flow Measurement Device (FMD) – DZR Copper Alloy PN25
ultra low flow variant	D902 DN15 Only Ultra Low Flow Measurement Device (FMD) – DZR Copper Alloy PN25
stainless line	DM900 DN20 to DN600 Flow Measurement Device (FMD) – Stainless Steel PN25
combined regulating valve	DM950G DN50 to DN400 Flow Measurement and Regulating Valve PN16
threaded connections	D901 - Sizes 1/2" to 2"
measuring element	Square-edged entrance orifice plates with tappings for P84 insertion-style test points
measurement accuracy	±5% flow measurement accuracy
d901 sizing basis	Suitable for systems with pipe frictional losses of 100 to 400 Pa/m
d902 ultra low flow band	0.015 to 0.06 L/sec (DN15 only; e.g. fan coil units)
flow capacity d901 d902	6.1 Kv / 4.7 Kvs (literature value)
temperature pressure rating	Threaded ends -10 to +100 °C at 25 bar, derated to 23.4 bar at 110 °C and 21.8 bar at 120 °C; compression ends 16 bar at -10 to +30 °C; WRAS approval to 99 °C
design standards extra	BS 7350: 1990, BS EN 10226, BS EN 1254-2, BS EN 12165, BS EN 12164
approvals	Water Regulations Advisory Scheme (WRAS)
dm950g construction	Double-regulating butterfly valve close-coupled to a fixed-orifice flow measurement device via a spool-piece connector; incorporates P84 pressure test valves
kv measurement principle	Q = Kvs × √ΔP / 36 (flow in L/s, ΔP in kPa) across the fixed orifice, read at the two test points
commissioning set definition	A regulating valve combined with a separate fixed orifice is commonly called a commissioning set; UK practice is proportional balancing of terminal circuits
Source 1 — venturi meter construction	Balancing valve for hydraulic systems. Flow meter with Venturi device. Stainless steel obturator. Complete with quick-fit pressure test ports.
Source 2 — flow meter principle	Balancing valve with flow meter and direct reading of flow rate. Ball valve for flow rate adjustment. Graduated scale flow meter with magnetic movement flow rate indicator.
Source 2 — flow regulation range	132402 G 1/2" (ISO 228-1) F 2–7 l/min
Source 2 — material rating	Technical data Material : brass Maximum percentage of glycol : 50 % Medium : water, glycol solutions Medium temperature range : -10–110 °C Maximum working pressure : 10 bar
Source 3 — flowmeter bypass design	This particular series of valves is equipped with a flow meter for a direct reading of the regulated flow rate. The flow meter is housed in a by-pass circuit on the valve body and can be shut off during normal functioning, allowing fast and easy balancing of circuits without the need for differential pressure gauges.
Source 3 — flanged size range	132 series Balancing valve with flow meter, flanged version sizes DN 65, DN 80 and DN 100
Source 3 — performance rating	Medium temperature range : -10–110 °C Maximum working pressure : 10 bar
Source 4 — venturi kvs signal	The venturi is able to accelerate the fluid velocity generating a measureable pressure loss or signal from which a flow co-efficient factor Kvs can be calculated.
Source 4 — flow chart reading	From this co-efficient the flow rate passing the valve can be calculated or using the signal the flow rate can be read off the appropriate flow chart
Source 5 — venturi in body	On 130 series threaded valves, the flow rate is measured with a Venturi device, housed inside the valve body. This devices guarantees balancing accuracy and is extremely practical to use during setting.
Source 5 — straight pipe requirement	We recommend keeping the upstream and downstream sections of pipe straight, as shown in the illustrations below, to ensure accurate flow measurement
Source 5 — installation clearance	The balancing valves must be installed in such a way as to ensure free access to the pressure test ports, drain cocks and the adjustment knob. The valves can be fitted on either horizontal or vertical pipes.
Source 6 — venturi valve role	Venturi valves provide balance, ease of commissioning, and shut-off in a wide range of HVAC systems.
dzr metering venturi accuracy	Integral venturi orifice for greater accuracy +/- 3%, The venturi orifice design allows for more stable signals without adding system resistance
dzr metering flow range	Flow range between 0.008 l/s and 3.2 l/s
dzr metering connections	FBSP (M/F ISO 7-1, F side ISO 228-1) for use with threaded pipe
dzr metering pressure temp rating	Maximum working pressure: 25 bar, Working range: 25 bar / -10oC to 110oC 20 bar / 110oC to 130oC
dzr metering size line	Xtra Low Flow DN15, Ultra Low Flow DN15, Low Flow DN15, Standard Flow DN15, Standard Flow DN20, Standard Flow DN25, Standard Flow DN32, Standard Flow DN40, Standard Flow DN50
dzr metering straight pipe rule	installed on straight pipe of the same nominal size as the valve and of minimum length equal to 5 pipe diameters at the inlet (10 diameters when installed at the outlet of a pump) and 2 pipe diameters at the outlet
dzr metering applications	Heating Chilled water Domestic hot and cold water, Not suitable for gas
dzr metering fluid scope	Not suitable for steam, oil or aggressive fluids
dzr metering approvals	WRAS Approved, Exempt from CE marking
dzr metering body materials	Body: DZR brass, Test Points: DZR brass
dzr metering nickel leaching control	Self-colour DZR brass body to limit nickel leaching and minimise water contamination