Pneumatic Actuated 3-Way Control Valve

Short Description:

Product Name: Pneumatic 3-Way Control Valve
Valve Category: Control Valve
Brand: Yiluoke
Technical Data: DN15-DN600
Made In: China
Supplier: Xiamen Yiluoke Import and Export Trading Co., Ltd

Product Detail

1. Product Overview

Pneumatic diaphragm 3-way control valve consists of multi-spring pneumatic diaphragm actuator and 3-way diverging / converging valve body. Equipped with electro-pneumatic valve positioner or pneumatic valve positioner, it realizes automatic regulation and control of fluid medium in process pipelines.

Features

The valve plug adopts cylindrical thin-wall window structure with side guiding for the plug. The valve body is of three-way structure: one inlet two outlets (3-way diverging valve) or two inlets one outlet (3-way converging valve). It can realize mixing heating/cooling of fluid or unequal flow diversion to meet various working conditions. This valve features compact structure, light weight, sensitive action, low pressure drop loss, large valve capacity, accurate flow characteristic and convenient maintenance.

Application Scenarios

Model ZJSF(H) pneumatic diaphragm 3-way control valve is widely used to precisely maintain process parameters such as pressure, flow, temperature and liquid level of gas, liquid, steam, heat transfer oil and other media at set values. It is suitable for temperature control of heat exchangers in petroleum industry. One 3-way valve can replace two single-seat or double-seat valves, occupying smaller space and saving pipeline installation cost.

2. Product Images

Pneumatic Actuated 3-Way Control Valve

3. Main Component Material List

Component Name	Material Options
Valve Body	WCB(ZG25), CF8(304), CF8M(316), CF3M(316L)
Valve Seat	304, 304, 316, 316L
Valve Plug	304, 304, 316, 316L
Gasket	PTFE, metal graphite spiral wound gasket
Bonnet	WCB(ZG25), CF8(304), CF8M(316), CF3M(316L)
Packing	PTFE, flexible graphite, polyphenylene sulfide
Gland	304, 304, 316, 316L

4. Main Technical Specifications

Nominal Diameter DN	20	25	32	40	50	65	80	100	125	150	200	250	300
Seat Diameter dn	20	25	32	40	50	65	80	100	125	150	200	250	300
Rated Flow Coefficient Kv (Diverging)	6.3	8.5	13	21	34	53	85	135	210	340	535	800	1360
Rated Flow Coefficient Kv (Converging)	-	-	-	-	-	-	85	135	210	340	535	800	1360
Allowable Differential Pressure MPa	3.5	3.2	2.2	2.2	1.4	1.38	0.94	0.61	0.51	0.36	0.2	0.19	0.13

Nominal Pressure: 1.6MPa, 2.5MPa, 4.0MPa, 6.4MPa, 10.0MPa Matching Actuator Model: ZHA/B-22, ZHA/B-23, ZHA/B-34, ZHA/B-45, ZHA/B-56 Rated Stroke mm: 16, 25, 40, 60, 100 Flow Characteristic: Linear, Equal Percentage Gland Type: Bolt compression type Sealing Packing: V-type PTFE packing, V-type flexible graphite packing Plug Type: Double guided sleeve plug Bonnet Type: Standard (-17℃+250℃), High Temperature (+250℃+450℃), Low Temperature (-40℃-196℃), Bellows Seal (-40℃+350℃)

Structure of Pneumatic Actuated 3-Way Control Valve

5. Pneumatic Diaphragm Actuator Parameters

Item	Specification
Actuator Type	ZHA/B multi-spring diaphragm actuator
Actuator Model	ZHA/B-22, ZHA/B-23, ZHA/B-34, ZHA/B-45, ZHA/B-56
Effective Diaphragm Area cm²	350, 350, 560, 900, 1400
Stroke mm	10/16, 24, 40, 40/60, 100
Spring Range KPa	20～100 (standard), 20-60, 60-100, 40-200, 80-240
Diaphragm Material	NBR with nylon fabric, EPDM with nylon fabric
Air Supply Pressure	140～400KPa
Air Connection	RC1/4"
Ambient Temperature	-30℃～+70℃
Optional Accessories	Positioner, air filter regulator, lock-up valve, limit switch, valve position transmitter, handwheel assembly, etc.
Action Mode	Air to Close (B, FO: Open on air failure); Air to Open (K, FC: Close on air failure)

6. Performance Index

Test Item	Without Positioner	With Positioner
Basic Error %	±5.0	±1.0
Hysteresis %	3.0	1.0
Dead Band %	3.0	0.4
Start/End Deviation (Air to Open) Start point %	±2.5	±1.0
Start/End Deviation (Air to Open) End point %	±5.0	±1.0
Start/End Deviation (Air to Close) Start point %	±5.0	±1.0
Start/End Deviation (Air to Close) End point %	±2.5	±1.0
Rated Stroke Deviation %	≤2.5	≤2.5
Leakage Rate L/h	0.01% × rated valve capacity	0.01% × rated valve capacity
Rangeability R	30:1	30:1