High Quality Ductile Iron Vodrv Variable Orifice Static Balance Valve

• Temperature: Low Temperature
• Certification: Wars
• Media: Water
• Standard: Standard
• Connection Mode: Flange
• Power: Manual
• Material: Ductile Iron&Brass
• Type: Double Seater
• Transport Package: Carton and Pallets
• Specification: DN50-DN500
• Trademark: DVK, OED
• Origin: China
• HS Code: 8481804090

Product Description

Feature and Benefits:
·Self-balance design, counterbalances the pressure on disc, reduces torque.
·2 O-rings sealing on disc, special cartridge disc, made from brass, shut off zero leakage, safety and reliable.
·Y type body design, higher flow rate.
·Lockable position, avoids errors operation..
·Electrostatically applied Akzo Nobel epoxy powder internally and externally, WRAS approved.
·Variable orifice body, accurate regulation, easy for pre-setting and reduces commissioning costs.
·With two pressure testing points available for different flow rate testing equipment.

Applicable Standards:
Flanges and drilling to BS EN 1092-2. 
Valves comply with BS 7350
Face to face to BS EN 558-1 
Pressure test with BS EN12266-2003

Technical Data:
Size: DN65~DN300(2 1/2″~12″) 
Nominal pressure: PN 16 
Temperature range: -10°C~120°C 
Suitable for: Water, glycol and neutral liquids
 

Materials Specifications
No.	Component			Material
1	Body Bonnet			Ductile Iron JS1040
2	Bonnet			Ductile Iron JS1040
3	Disc			Brass HPb59-1
4	Stem			Brass HPb59-1
5	O-ring			EPDM Rubber
6	Handwheel			PA6(DN65~DN150); Aluminum(DN200~DN300)

 

Dimensions:
Item	Inch	DN	L	H	D	D1	F holes	n-d	KG
1	21/2″	65	290	215	185	145	4	4-19	13.05
2	3″	80	310	225	200	160	8	8-19	16.05
3	4″	100	350	240	220	180	8	8-19	21.65
4	5″	125	400	270	250	210	8	8-19	31.6
5	6″	150	480	280	285	240	8	8-23	47.75
6	8″	200	600	420	340	295	12	12-23	79.25
7	10″	250	730	450	405	350	12	12-28	126.5
8	12″	300	850	480	460	410	12	12-28	236

Survey and functional description
The balance is achieved by a presetting with memory position.    The calculated flow rate or pressure loss for each individual pipe can be preset centrally and be regulated precisely.
The required values of presetting can be obtained from the flow charts. The flow charts are valid for the installation of the double regulating and commissioning valve in the supply or the return pipe provided the direction of flow conforms to the arrow on the valve body. All intermediate values are infinitely adjustable. The selected presetting can be read off two scales (basic setting longitudinal scale and fine setting peripheral scale, see illust- ration 1.1).
The limit stop of the presetting is maintained even if the double regulating and commissioning valve is closed.
The double regulating and commissioning valves have two threaded ports which are equipped with the pressure test points for measuring the differential pressure.

Installation
Before installing the valve, the pipe work has to be flushed thoroughly. Installation is possible in any position (horizontal, oblique or vertical, in ascending or descending sections). It is important to note that the direction of flow must conform to the arrow on the valve body and that the valve must be installed with L = 5 x Ø of straight pipe in the upstream side and with L = 2 x Ø in the downstream pipe. The double regulating and commissioning valve can be installed in either the supply or the return pipe.
After installation, the handwheel and measuring connection must be easily accessible.

Operation
A. Deaeration of the system
Before initial operation, the system has to be filled and bled with due consideration of the permissible working pressures.
B. Correction factors for water and glycol mixtures
The correction factors of the antifreeze liquid manufacturers have to be taken into consideration when setting the flow rate.
C. Presetting
1. The presetting value of the valve is set by turning the handwheel.
a. The display of the basic setting is shown by the longitudinal scale together with the sliding indicator.
Each turn of the handwheel is represented by a line on the longitudinal scale.
b. The display of the fine setting is shown by the peripheral scale on the handwheel together with the marking. The subdivisions of the peripheral scale correspond to 1/10th of a turn of the handwheel.
2.Remove cover plug by introducing a screwdriver in the slot and gently prising it off.
3.Limitation of the set presetting value by turning the inner adjustment stem clockwise until it seats. This can be done by using the long end of slot type screwdriver.( see illustration 1.3!)
4. Refit the cover plug.


5. Caution! Installation space.
Generally, when connected to an elbow or a pump, the   
valve must keep a certain distance from the elbow or the pump. The rule is shown in the right figure (see illustration 1.4)

KV value chart.
 

Static  Balancing Valve - Ductile Iron Flange Type
Flow Coefficient Value (Kv)
Size  Turn	DN40	DN50	DN65	DN80	DN100	DN125	DN150	DN200	DN250	DN300	DN350	DN400	DN450	DN500
1	10.1	10.1	15.5	16.3	26.0	22.0	27.9	67.0	109.0	128.0	170.0	238.0	275.0	352.0
2	21.1	21.1	32.5	32.2	45.0	53.0	54.9	127.0	184.0	211.1	261.0	393.0	465.0	611.0
3	31.6	31.6	48.7	52.5	59.0	74.0	76.8	191.0	264.0	290.3	405.0	587.0	685.0	928.0
4	37.8	37.8	58.1	67.5	69.0	96.0	97.6	278.0	356.0	350.6	597.0	808.0	900.0	1289.0
5	41.9	41.9	64.4	77.2	95.0	125.0	117.2	388.7	438.8	481.2	795.0	1100.0	1284.0	1634.0
6	45.1	45.1	69.3	86.2	127.0	156.0	143.2	474.3	538.6	624.2	1030.0	1440.0	1634.0	1983.0
7	48.7	48.7	74.9	96.4	144.5	193.0	186.5	558.7	661.7	731.0	1246.0	1678.0	1947.0	2413.0
8	47.6	47.6	83.1	104.7	166.5	226.0	225.2	638.1	770.0	886.9	1527.0	1946.0	2364.0	2804.0
9	55.6	55.6	92.7	114.5	187.5	253.2	265.9	719.5	826.7	1042.1	1707.0	2238.0	2694.0	3212.0
10						286.5	321.5	758.0	920.0	1177.3	1884.0	2522.0	2970.0	3528.0
11							362.6		1010.0	1330.1	2048.0	2689.0	3270.0	3774.0
12							395.0		1102.5	1429.1	2162.0	2894.0	3525.0	3992.0
13										1516.6	2250.0	3050.0	3720.0	4180.0
14

Packing and shipping
Inner package: plastic bags                                  Product package: carton and pallets
Delivery package: plywood cases available           Delivery package: steel cases for premium option

About us
1. More than 20 years experience for valves, fittings, etc..
1. Professional R&D teams in Germany & China for HAVC and waterworks system.
2. Strict products inspection, SOP processing.
3. 6S management, higher quality material with higher price.
4. Quick feedback service, feedback within 24 hours.
5. All sales have more than 10 years experience on service.

Factory capacity
           
Welcome visit us

FAQ:
Question 1: Can you make OEM or ODM product?

DVK: Yes, if QTY attractive enough, we can create new mould for you, make bodies casting with your logo and your nameplate; if QTY not attractive enough, will be only with your nameplates or labels.

Question 2: How long is your delivery time?

DVK: General speaking, we have some stock for regular products, it is 1~2 weeks if the goods are in stock; if not in stock will be 4~8 weeks, depends on quantity.

Question 3: Do you provide free samples?  
DVK: If samples available in stock, yes, we could offer the free sample to you, but the air cost or courier cost will be on your account.

Question 4: What are your payment terms?

DVK: Order value less than 2000USD, 100% in advance. Order value more than 2000USD, 30% T/T in advance,balance before shipment. L/C available as well.