Basic Info.
Measuring Range
Medium-pressure Gauge
Application
Industrial, Civil
Structure
Spring Pressure Gauge
Connection Type
Radial Direction
Function
Local Indication Type
Installation Structure
Direct Mounting
Features of Measurement Medium
General Pressure Gauge
Indicating Pressure Reference
General Pressure Gauge
Product Description
Diaphragm Pressure Gauge Overview
Diaphragm pressure gauge (chemical seals pressure gauge) is composed of a conventional pressure gauge, connector and a diaphragm seal. This combination enables a general industrial purpose pressure gauge to measure media of strong corrosion, high temperature, and high viscosity, containing suspended matter or crystallizing. Diaphragm pressure gauges are universally used in petrochemical, alkali, and chemical fiber, pharmaceutical, metallurgical, and food industries. We are a China Diaphragm pressure gauge manufacturer, we supply cheap custom diaphragm pressure gauge but still with robust and stable quality. Custom diaphragm seal pressure gauge, such as sanitary pressure gauge, capillary type pressure gauge, flanged pressure gauge, flush mount pressure gauge, high temperature pressure gauge.,etc. welcome to send your drawings or your technical specifications for pressure gauge diaphragm type. We will design for you.
Configuration Principle of Diaphragm Pressure Gauge
This illustration shows the operating principle of the pressure gauge with diaphragm seal. The diaphragm is deflected by the pressure of medium P, and an equivalent pressure P is generated. With transmitting through working fluid, the pressure P. deflect the elastic element of a pressure measuring instrument which thereafter shows the pressure value.
Level Difference of Diaphragm Pressure Gauge Seals Liquid
When a sealed diaphragm pressure gauge is mounted with pressure gauge and diaphragm seal at different positions, the effect of level difference should be taken into consideration (especially for a diaphragm gauge with capillary).As the illustration shows, with a S.G of the working fluid at approx.1, and level difference of 1m, the pressure difference of Diaphragm manometer is approx.0.001Mpa.
Temperature Influence of diaphragm pressure gauge
The temperature influence of a pressure gauge diaphragm type is relative to expansion coefficient of the seals working fluid, rigidity of the diaphragm, and temperature of pressed part. When working temperature deviates from 20±5°C,the indication varies within 0.1%/°C for rigid system, and within 0.1+0.025L%/°C (L-length of capillary in m.) for flexible system (remote mounting). Diaphragm manometer is filled with suitable working fluid according to different operating conditions.
| Working Fluid | Temperature range for Diaphragm equipment | Specific Gravity
g/cm2 | Factor of Expansion 1/°C |
| Glycerin-Water Solution | -5-100°C | 1.27 | 0.61×10- 3 |
| Silicon (low viscidity) | -40-130°C | 0.94 | 1.08×10- 3 |
| Silicon (high viscidity) | -30-240°C | 1.07 | 0.95×10- 3 |
| Fluorocarbon Oil | -30-160°C | 1.93 | 0.75×10- 3 |
| Vegetable Oil | -5-100°C | 0.93 | 1.03×10- 3 |
Or other special working fluid
Corrosion-Proof Properties of diaphragm pressure gauge
§ Our Diaphragm Seal Pressure Gauge satisfies customer's requirements of both environmental conditions and flow conditions (corrosive media) based on its significant corrosion-proof properties. Choose various diaphragm pressure gauges combined with appropriate separator according to environmental conditions. Choose material of chemical seal diaphragm and housing compatible with corrosive media.
§ Diaphragm Material: SUS316,SUS316L,Monel (Cu30Ni70),Hastelloy(HC276), Tantalum (Ta), Fluoroplastic (PTFE)coated
§ Body Material: 1Cr18Ni9Ti,SUS316, SUS316L,Fluoroplastic (F4), Fluoroplastic Coated Stainless Steel
§ Gasket Material: Nitrile Rubber, Viton, Silicone Rubber, Fluoroplastic
§ Options for diaphragm material
Anti-corrosion materials for diaphragm pressure gauge
| CorrosiveMedia | SUS316L | Tantalum | Monel | Hastelloy | Ti | PTFE |
| Vitriol(H2so4) | △ | σ | ∨ | ∨ | × | ∨ |
| Nitric acid(HN03) | ∨ | σ | × | ∨ | ∨ | ∨ |
| Muriatic acid (HCI) | × | σ | × | ∨ | △ | ∨ |
Phosphoric
acid (H3P04) | ∨ | σ | ∨ | ∨ | × | ∨ |
| Acetate (CH3COOH) | ∨ | σ | ∨ | σ | σ | ∨ |
| (NaOH) | σ | △ | σ | σ | ∨ | ∨ |
| Pure alkali (Na2CO3) | σ | σ | σ | ∨ | ∨ | ∨ |
| Saleratus (NaHC03) | σ | σ | σ | σ | σ | ∨ |
| Chlorine (Cl) | Dry:V. Wet:× | σ | Dry:∨. Wet:× | ∨ | Dry:×. Wet:σ | ∨ |
| Bromine (Br2) | Dry:V. Wet:△ | σ | Dry:σ. Wet:× | σ | ∨ | ∨ |
| Ammonia (NH3) | ∨ | × | × | σ | σ | ∨ |
| Sea water (30% NaCI) | ∨ | | σ | σ | σ | ∨ |
Remark:σ-best; △-conditional; ∨-use; ×-no using.
Standard material for Diaphragm manometer is SUS316L,corrosion-proof materials should be applied in normal temperature.
Diaphragm Pressure Gauge Model Selection
| Item | Code | Description |
| Basic Type | Y | Generalservice pressure gauge |
| Material | F | Stainless steel Pressure Gauge (Option) |
| Function | ZT | With resistance transmitting |
| N | Oil filled Pressure Gauge (anti-vibration) |
| XC | Snap-action electric contact pressure gauge |
| SZ | Three pointers |
| S | Others |
| Diameter | 60 | Φ60 |
| 100 | Φ100 |
| 150 | Φ150 |
| | Others |
Connectors
*refer to table 5 | Z | Direct Mounting (Medium< 80°C) |
| Z1 | Damper(Medium< 80°C) |
| Y1 | Capillary(Medium< 200°C) |
| R1 | Radiator(Medium< 200°C) |
| G1 | OverpressureProtector(Medium< 80°C) |
| C | Special Angle(Medium< 150°C) |
| R4 | Siphon (1,2,4,6 meters) |
Diaphragm Seals
*refer to table6 | F8 | Diaphragm seal with thread connection |
| F1 | I-Shape Flange |
| F2 | diaphragm seal with flange connection |
| F4 | Angle Adjustable |
| F5A | Extended Thread |
| F5B | Extended Flange |
| F6 | Tri-Clamp Connection |
| F7 | Threaded Connection (Sanitary Type) |
| F9 | In Line Diaphragm Seals |
| Diaphragm Material | 1 | Stainless steel 316 |
| 2 | Stainless steel 316L |
| 3 | Hastelloy |
| 4 | Monel |
| 5 | Tantalum |
| 6 | PTFE |
| Range | M*** | (Refer to range table 4) |
| Option | | Flange size and standard |
| Table of Pressure Gauge Ranges |
| Code | Ranges | Code | Ranges | Code | Ranges |
| M500 | -0.1~0MPa | M030 | 0.1Mpa | M180 | 4Mpa |
| M510 | -0.1~0.06Mpa | M040 | 0.16Mpa | M200 | 6Mpa |
| M520 | -0.1~0.15Mpa | M060 | 0.25Mpa | M220 | 10Mpa |
| M530 | -0.1~0.3Mpa | M080 | 0.4Mpa | M230 | 16Mpa |
| M540 | -0.1~0.5Mpa | M100 | 0.6Mpa | M240 | 25Mpa |
| M550 | -0.1~0.9Mpa | M120 | 1Mpa | M270 | 40Mpa |
| M560 | -0.1~1.5Mpa | M140 | 1.6Mpa | M280 | 60Mpa |
| M570 | -0.1~2.4Mpa | M160 | 2.5Mpa | | |
http://www.made-in-china.com/showroom/silver-sales/
Address:
Jinsheng Rd 199#, Jiangning, Nanjing, Jiangsu, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Electrical & Electronics
Management System Certification:
ISO 14000, ISO 9000
Company Introduction:
Silver Automation Instruments are expert in the Manufacturing and sales of industrial process instrumentation. Our products have passed ISO9001 International Quality System.
The main classifications are:
Flow measurement,
Level measurement,
Temperature measurement,
Panel meters & chart recorders;
Our main products are: SDRD & SODA series Radar level sensor, SHD magnetic flow meter, STLU Vortex Flow meter, HH5 Variable area flow meter, SGW Gas Turbine Flowmeter, SLW Liquid Turbine Flowmeter, LC Oval Gear Flowmeter, SH series Pressure transmitters and SX series chart recorders & Temperature instruments. All the products are calibrated before leaving factory.
Our products are widely used in chemical industry, environmental protection, metallurgy, pharmaceutical, paper making, water supply and treatment etc.
The principle of our company is " Managing Our Company Creatively and Satisfying Our Customers".
The advantage of Silver Automation Instruments is
Quite reasonable price, Professional Service & Fast delivery time.
We provide qualified products and excellent services to our customers, and develop together with the friends in automation instruments fields.
