2401型指挥器操作式自力式压力调节阀

188

Product

BAIC GROUP

2401 Type Pilot Self-Operated Pressure Regulator

2401 type pilot self-operated pressure regulator (referred to as pressure valve) does not require additional

energy, it uses the regulated medium's own energy as a power source, introduce the pressure valve's pilot to

control the valve core position of the pressure valve, change the flow rate through the valve, so that the

downstream pressure (B-type) or the upstream pressure (K-type) maintain a constant. 2407B type is mainly

used in the case of high pressure before the valve (0.2~0.8MPa) and low force after the valve (0.5~100KPa),

such as case in 50mmH2O (water column), 2409 type is only used in the nitrogen drain device and is used in

conjunction with the nitrogen supply device. Replace the valve with a 2001 type valve when used individually.

1. Air decompression

Upstream pressure of the valve 0.2~0.8MPa (When higher than 0.8MPa, pressure reducing valve should be

added before the valve), Downstream pressure of the valve 0.5~100KPa.

2. Nitrogen sealing device

On nitrogen supply and nitrogen drain devices

Characteristics

1. Pressure setting is realized on the pilot, thus it is convenient, quick, labor-saving and time-saving and can be set

continuously under the running condition.

2. Control accuracy is about 1 times higher than the 2000 series self-operated, so it is suitable for use in high-precision

occasions.

3. For the same valve, the regulation range is wider than 2000 series self-operated.

4. The reaction is particularly sensitive, very small pressure (such as the pressure of 50mm water column) or very small

pressure changes can be felt.

5. The pressure reduction ratio is particularly large, e.g. for 0.8MPa before the valve, 50mm water column after the valve,

differential pressure ratio of up to 1600!

After control valve (2407- 16B) After control valve (2407- 16K)

(Nitrogen supply device 2409 type) (Nitrogen drain device 2409 type

1. Pressure setting spring 2. Pilot actuator 3. Pilot valve 4. Needle valve 5. Main valve 6.

Air filter decompresser

Wherein the 2407-16B valve can be replaced by a 2001 self-operated valve + a 2101

type micro-pressure valve

Wherein the 2407-16K valve can be replaced by a 2101 type micro-pressure valve.

189

Product

BAIC GROUP

Main parts materials

Part Name Material

Valve body ZG230-450, ZGOCr18Ni9, ZGOCr18Ni12Mo2

Valve core 1Cr18Ni9. 0Cr18Ni12Mo2 (build-up welding Stellite) PTFE

Valve seat 1Cr18Ni9. 0Cr18Ni12Mo2 (build-up welding Stellite)

Valve stem 1Cr18Ni9, 0Cr18Ni12Mo2

Rubber membrane NBR reinforced polyester fabric

Film cover Q235, Q235 coated with PTFE

O-ring Oil-resistant rubber, PTFE

Application examples

1. Replaces 2101 type micro-pressure valve

2101 type micro-pressure valve upstream pressure generally requires medium pressure to be ≤ 0.

1MPa, while the type 2407 with the pilot self-operated pressure regulator is not subject to this limitation.

2. For nitrogen sealing device

Storage tanks of nitrogen sealing device is covered with nitrogen at the upper end of the refined oil, the

pressure of which is generally around 100mmH20, and is controlled by a nitrogen sealing protective device.

When the liquid outlet valve is opened to drain the oil, the liquid level in the storage tank decreases, at

this time, the opening degree of the 2407B nitrogen supply regulator increases, and the nitrogen is added

to the storage tank so that the pressure increases to the set value. When inlet valve opens with oil inlet, the

liquid level rises, the volume of the air phase part decreases, and the nitrogen pressure rises, at this time,

the 2407-16B nitrogen supply regulator closes, and the 2407-16K nitrogen drain regulator opens under the

action of the pressure controller, discharging nitrogen so that the pressure drops to the set value. To

ensure the safety of storage tanks, breathing valve should be installed at the top of the tank.

Nitrogen supply pressure regulation: Select a set value such as 1KPa (100mm.W.C) in the 2407-16B

pressure regulator, and achieve it by adjusting the amount of pre-compression (extension) of the main

spring 1;

Nitrogen discharge pressure regulation: In the pressure controller part of 2407-16K discharge valve, it is

reached by adjusting the main spring pre-compression, generally to avoid frequent opening and closing of

nitrogen sealing device, the nitrogen discharge set value should be far away from the nitrogen supplying

pressure set value, for example, 2KPa (200mm.W.C). Breathing valve set value regulation: After the above

two set values are adjusted, in order to avoid frequent opening and closing of the breathing valve, the

breathing valve set value should be greater than the pressure discharge set value. The two settings should

also not be too close. Breathing valve model: 2701 type. 2001-16B pressure set value is Pc, 2001-16K

pressure set value P1, values Pc and P1 can not be too close, so as the valve not to work too frequently,

breathing valve discharge pressure P2 set value should be greater than P1, values P1 and P2 can not be

too close as well. The relationship between the three Pc<P1<P2.

190

Product

BAIC GROUP

Main technical parameters and performance indicators

Nominal diameter DN (mm) 20 25 32 40 50 65 80 100 125 150

Valve seat diameter D (mm) 6 15 20 25 32 40 50 65 80 100 125 150

Rated flow coefficient Kv 0.32 4 5 8 12.5 20 32 50 80 125 160 320

Pressure regulation range KPa Selection in the range 0.5-100

Nominal pressure PN(MPa) 1.01.6

Regulated medium temperature

(℃)

-40～80

Flow characteristics Quick open

Regulation error (%) ≤5

Allowable pressure drop (MPa) 1.6 1.6 1.1 0.4 0.6

Effective area of actuator

membrane (Cm²) 200 280 400

Allowable leakage amount Hard valve core: Class IV (10-4 × Kv) Soft valve core: Class VI, GB/T4213-92) almost no leakage

Outline dimensions and weight

Unit: mm

The above are all based on PN16 as an example

Connection dimensions and standards

· Flange standard GB/T9113-2000.

· Flange sealing surface type: convex.

· Signal interface: internal thread M16×1.5

· Distance between valve body flange and flange end surface can be

manufactured according to user specified standards, such as ANSI, JIS,

DIN, etc.

191

Nitrogen seal principle diagram

Product

BAIC GROUP

Application design examples

The above example is based on a tank of 1 KPa.

1. 2409-16B valve pressure taking location should be closer to the storage tank (or buffer tank).

2. The pressure gauge should be placed not far from the pressure taking point to avoid

unnecessary disputes.

3. 2409-16B pipeline after valve should not be too small (generally larger than the pipeline before

the valve).

Nitrogen drain

Breathing

valve set Pressure Pressure

guage guage 3KPa Set 1KPa

ZZYP - 16KII Nitrogen supply More than 20DN

ZZYP - 16BII or ZZVP - 16K

Set 1KPa

Material

Breathing

valve set

3KPa Pressure

guage

Nitrogen drain

Set 2KPa

Discharge to

Set 2KPa

Discharge to

atomasphere

atomasphere

Nitrogen supply More than 20DN ZZYP - 16KII

ZZYP - 16BII or ZZVP - 16K

Set 1KPa

Material

Set 1KPa

Ordering information

When ordering, users are requested to

provide the following materials

· Regulator name, model and purpose. · Nominal diameter

· Rated flow coefficient (Kv).

· Operating pressure and range.

(mm).

· Intrinsic flow characteristics

· Nominal pressure(MPa).

·

valve inner parts and packing.

Media name.

· Material requirements for valve body, · Other special requirements.