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雙調節平衡閥（DRV）

雙調節閥是帶標定手輪與確定止動的靜態平衡閥：設定值可預置、鎖定並重新打開至完全相同的位置——這正是水力調試所需。產品範圍涵蓋青銅 PN25 系列 DN15 至 DN50（含 DN15 小流量變體）與球墨鑄鐵 PN16 系列 DN65 至 DN600，齒輪驅動（DN50-DN600）與手柄驅動（DN65-DN150）變體，端接為法蘭或 BS EN 10226 錐形/平行螺紋。選型取決於管徑與流量、系統對青銅或球墨鑄鐵、安裝位置的手輪操作，以及記憶止動設定範圍。多來源資料補充運行框架：英式術語「雙調節」指經記憶止動在關閉後可精確恢復設定位置、在三通混合/分流閥旁路中產生流阻的主要任務、Y 型截止閥體全開時壓損最小、VODRV 的 Kv 對 delta-P 設定法（最小設定點附近精度 ±15%）、FODRV 調試閥以固定 Kvs 孔口或文丘里測量（典型精度 +5%）、低壓差系統的文丘里壓力回收、遵守閥體流向箭頭的單向安裝、模擬未來系統負荷的 DRV 旁通，以及以 PICV 取代調試閥的變流量趨勢。

屬於平衡閥系列

最後更新： 2026-11

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系列規格

Nominal valve connection size	DN50 to DN150
Pressure class / nominal rating designation	Class 150, PN16
End connection types	End Connections Flanged
Valve body material	Bronze, Ductile Iron
Design standards	DIN EN 13709, DIN 3356
Inspection and pressure-test standards	EN 12266-1
bronze line	D921 DN15 to DN50 Double Regulating Valve (DRV) – Bronze PN25
bronze low flow variant	D923 DN15 Low Flow Double Regulating Valve (DRV)
ductile line	DM921 DN65 to DN300 Double Regulating Valve (DRV) – Ductile Iron PN16
Gearbox variant	DM925G / DM925L DN50 to DN600 1/4 Turn Gearbox Operated Double Regulating Valve (DRV) – Ductile Iron PN16
Lever variant	DM925LW DN65 to DN150 Lever Operated Double Regulating Valve (DRV) – Ductile Iron PN16
threaded connections	Sizes 1" to 2" taper threaded to BS EN 10226-2 (ISO 7-1) formerly BS 21
memory stop principle	a valve capable of being set to a desired degree of opening, locking that position with a memory stop to ensure the position can be retrieved exactly after the valve has been closed.
bypass duty 3port	In the UK the Double Regulating Valve [DRV] is primarily used to create flow resistance or a pressure drop in the by-pass of a 3-Port mixing or diverter valve or for simulating a load for a future loop.
no flow measurement	Keep in mind that this balancing valve doesn’t provide any flow measurement.
butterfly memory stop ref	For line sizes from DN 65, Butterfly valves that have been fitted with a memory stop can offer the same functionality as the traditional globe design while being lighter, smaller, easier to install and less costly.
vodrv definition	The DRV is sometimes referred to as “ Variable Orifice Double Regulating Valve ” [VODRV].
vodrv kv method	The flow rate is calculated using the Kv value for each handwheel setting and the Δ P across the valve.
vodrv accuracy ref	The measurement accuracy may be adversely affected by this principle by plus or minus 15%, when close to the minimum set point (25% open as per CIBSE guideline).
vodrv unidirectional	The valve is unidirectional and the direction of the flow arrow on the valve body must be respected.
fodrv definition	The Fixed Orifice Double Regulating Valve [FODRV] is also referred to as Commissioning Valve or Commissioning Valve Set.
fodrv accuracy ref	The accuracy of this type of valve is typically + 5%, depending on the opening position.
venturi pressure recovery	The FODRV with venturi minimises turbulence and recovers a significant proportion of the pressure loss after flow has passed through it, and can be close coupled, which makes the venturi FODRV suitable for systems with low differential pressure.
picv variable flow trend	Commissioning Valves are not suitable for variable flow and have been replaced by PICVs.
bypass future load	Install a DRV bypass between flow and return to simulate future system load.
y pattern globe body	Typically this valve is a Y pattern globe valve arranged in this way to present the smallest pressure loss to the system when fully open.
double regulating meaning	The description DOUBLE regulating means that it has a feature whereby you can set the position that the valve is to operate at in such a way that you can still close the valve for maintenance purposes.
resistance reduces flow	Adjustment of this valve will add resistance to the system and hence reduce the flow.
peer fodrv line	Peer FODRV execution: fixed-orifice commissioning valve in corrosion-resistant brass with brass test points, screwed female BSP, PN25, -10°C to 120°C
peer vodrv line	Peer VODRV execution: variable-orifice double regulating valve in ductile iron, flanged PN16, -10°C to 120°C, supplied with 2 test points
Source 1 — venturi valve construction	Balancing valve for hydraulic systems. Flow meter with Venturi device. Stainless steel obturator. Complete with quick-fit pressure test ports.
Source 1 — Valve body material	Material : dezincification resistant brass DR
Source 1 — Service temperature range	Medium temperature range : -20–120 °C
Source 1 — Maximum working pressure	Maximum working pressure : 16 bar
Source 1 — glycol limit	Maximum percentage of glycol : 50 %
Source 2 — memory stop principle	Memory stop/Sealing locking The valves are equipped with an adjustment position memory system that, after full closure which can be necessary for various reasons, allows easy re-opening at the initial position.
Source 2 — setting seal locking	There are two holes on the knob that can be used to seal (5) the setting position to avoid or detect any tampering over time.
Source 2 — presetting method	Knowing the value of the pressure drop p that needs to be created by the valve with a certain flow rate G, you can obtain the adjustment position number for the knob (PRESETTING).
Source 2 — adjustment scale	clockwise turn of the knob moves the red indicator by one step, from position 0 (valve closed) to position 6 (fully open valve). In addition, the decimal graduations of the black micrometric scale enable further refining of the adjustment.
Source 2 — 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 3 — fodrv definition	is a fixed orifice double regulating valve (FODRV) which uses a venturi to measure the flow of liquid passing through the valve.
Source 3 — venturi definition	A venturi is a fixed orifice device consisting of two different diameters with a tapered section between them. The smaller diameter is referred to as the throat.
Source 3 — venturi upstream	The venturi is located upstream of the double regulating valve which provides stable flow measurement during flow regulation.
Source 3 — Valve body material	Component Material Grade Body DZR alloy BS EN 12165 CW602N Cover DZR alloy BS EN 12165 CW511L Stem DZR alloy BS EN 12164 CW724R Regulating disc Stainless steel AISI 303 Seal seat DZR alloy BS EN 12165 CW602N Disc seal PTFE Seals EPDM rubber
Source 3 — memory stop restriction	The valves are equipped with an adjustable memory stop that, after full closure allows easy re-opening to the set position.
Source 3 — position indicator	The valve position is indicated by 2 digits on the upper side of the handwheel, one digit indicates the number of full turns from closed (6) and the second indicating the partial turn (10).
Source 3 — technical data	Number of adjustment turns: 6 Female connecting threads: BS EN 288-1
Source 3 — stem seal design	The double `O' ring stem seal (3) prevents water coming into contact with the actuating thread of the stem and causing leakage.
Source 4 — threaded size range	Threaded version sizes DN 15 (1/2"), DN 20 (3/4"), DN 25 (1"), DN 32 (1 1/4"), DN 40 (1 1/2"), DN 50 (2")
Source 4 — flanged size range	Flanged version sizes DN 65, DN 80, DN 100, DN 125, DN 150, DN 200, DN 250, DN 300
Source 4 — flange standard	DN 65, 80, 100, 125, 150, 200, 250, 300; PN 16 - EN 1092-2
Source 5 — venturi valve role	Venturi valves provide balance, ease of commissioning, and shut-off in a wide range of HVAC systems.
Disc Materials	Ductile Iron, SS304, SS316, Bronze
shaft materials	SS410, SS431
seat ring materials	EPDM, NBR
o ring materials	EPDM, NBR
bushing materials	PTFE, Bronze
flanged end standard	EN 1092-1 PN25
Face-to-face dimensional standard	EN 558-1

範圍與來源備註

measurement accuracy	Measurement accuracy: reference VODRV principle can drift plus or minus 15% near the minimum set point (25% open per CIBSE), while the tenant page presents a calibrated handwheel with no stated measurement accuracy - accuracy class is unstated on the tenant page.
line size alternative	Line-size alternative: reference practice offers butterfly valves with memory stops as functionally equivalent from DN 65 upward (lighter, smaller, cheaper), while the tenant globe-design DRV lines run DN65 to DN600 - the globe-versus-butterfly split is not represented on the tenant page.
system trend positioning	System-trend positioning: reference guidance states commissioning valves are not suitable for variable flow and have been replaced by PICVs, while the tenant page positions static balancing DRVs without the variable-flow caveat.
peer pressure material mix	Peer pressure/material mix: peer executions offer PN20 brass screwed FODRV lines and PN16 flanged ductile-iron VODRV lines, versus the tenant PN25 bronze and PN16 ductile-iron lines - peer brass PN20 sits between the tenant bronze PN25 and ductile PN16 bands.