Overview of ZJHP Pneumatic Single Seat Valve 
ZJHP series of pneumatic film through the single-seat control valve with a top-oriented structure , with a multi-spring actuator. With a compact structure, light weight, action sensitive, the fluid channel was 3 streamlined, the pressure drop is small, the valve capacity, the flow characteristics of precision, easy disassembly and so on. Widely used in the precise control of gas, liquid and other media, process parameters such as pressure, flow, temperature, liquid level maintained at a given value. Particularly suitable for applications that allow leakage of small valves before and after the pressure difference is not the workplace. 
This series of products are standard, adjust the cut off the valve, bellows seal type, jacket insulation and other varieties. Product nominal pressure rating PN10, 16,40,64; body diameter range DN20 ~ 300. Applicable fluid temperature from -196 ℃ ~ + 560 ℃ range of a variety of grades. Leak star standards are Class IV or VI. Flow characteristics are linear or equal percentages. Variety of specifications to choose from.

Characteristics of ZJHP Pneumatic Single Seat Control Valve 
1. Top-oriented single-seat control valve, compact structure, less parts, easy maintenance. 
2. Metal spool for a variety of work occasions, up to Class IV leakage standards, soft seal structure of the valve level of grade VI leakage. 
3. The valve body according to the principle of fluid mechanics designed to equal section low resistance flow channel, rated flow coefficient increased by 30%. Adjustable range, the inherent adjustable ratio of 50: 1. The actuator uses a multi-spring construction with a 30% reduction in height. , Weight reduction of 30%. 
4.ZJHPW bellows sealing control valve, the movement of the stem to form a complete seal, blocking fluid leakage. ZJHPJ-type control valve with a jacket, for fluid cooling after crystallization, solidification caused by clogging occasions.

Main parts commonly used materials

Single seat valve main technical parameters

Key performance indicators

Note: The performance of this product in line with GB / T4213-2008

Pneumatic type (positive role) Metal seal type Allowable pressure table Unit: MPa

Pneumatic type (reaction) Metal seal type Allowable pressure table Unit: MPa

Pneumatic type (reaction) Metal seal type Allowable pressure table Unit: MPa

Pneumatic type (positive role) Metal seal type Allowable pressure table Unit: MPa

Note of the allowable pressure table: 
1. The packing material is PTFE 
2. The direction of the medium is opposite to that of the spool 
3. Metal seal type leakage class for the IV level 
4. Values are subject to nominal pressure, pressure, and temperature limits 
5. Bellows sealed P2 ≠ 0 to be re-checked;

Dimension and weight Unit: mm

Please fill in the "specifications" or specify the following when ordering: 
First, if the order has not been selected before the model, please provide us with your use parameters 
1, nominal diameter, rated flow coefficient Kv 
2, fluid properties (including nominal pressure, temperature, viscosity or acidity) 
3, the role of valve form (gas - off or gas - open) 
4, flow was characteristics 
5, the valve before the valve pressure 
6, the valve body, core materials 
7, the input signal 
8, whether with attachments, description of the annex model, so that we for your correct selection.

Second, the special requirements 
1, special inspection 
2, completely to the oil, to the water treatment; 
3, copper treatment; 
4, special interface, piping; 
5, the use of vacuum conditions; 
6, specify the coating color 
7, special medium (gas, chlorine, nitrogen) 
8, the use of stainless steel connections;

Third, if the design unit has been selected by the company's product model, please press the model directly to our sales department ordered four, when the use of the occasion is very important or more complex pipeline, please provide you with the design drawings and detailed parameters , By our experts for your audit check.